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Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Skills
Certifications
Languages
Alex Chen
— Summary —
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
— Experience —
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
— Projects —
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
— Education —
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
— Skills —
— Certifications —
— Awards —
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
— Languages —
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
— Summary —
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
— Experience —
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
— Education —
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
— Projects —
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
— Skills —
— Certifications —
— Awards —
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
— Languages —
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
AlexChen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Alex Chen
— Summary —
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
— Experience —
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
— Education —
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
— Projects —
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
— Skills —
— Certifications —
— Awards —
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
— Languages —
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Alex Chen
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Skills
Certifications
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
Languages
Summary
Senior software engineer with 7+ years building distributed systems at scale. Led platforms serving 200M+ MAU, owned multi-million-dollar infrastructure migrations, and mentored 10+ engineers. Strong in Go, TypeScript, and Kubernetes; experienced across web, mobile, and ML serving stacks.
Experience
- Led migration of the payment routing service from Ruby to Go, cutting p99 latency from 240ms to 85ms and saving $1.8M/year in compute cost.
- Designed an idempotency framework now used across 14 teams, eliminating 92% of duplicate-charge incidents over 6 months.
- Owned the 0→1 launch of a fraud-scoring pipeline processing 50M events/day, reducing chargeback rate by 28%.
- Mentored 4 engineers (2 promoted to senior); ran the eng-onboarding bootcamp for 32 new hires.
- Authored the team's API design RFCs; reviewed 200+ PRs/quarter with sub-12-hour median turnaround.
- Rebuilt the search-ranking service in Kotlin + gRPC, improving booking conversion by 11% ($90M annualized GMV lift).
- Migrated 400+ legacy MySQL queries to a new sharded Postgres cluster, cutting read latency 3× under peak load.
- Shipped real-time pricing experiments to 50% of hosts; A/B framework adopted as the platform standard across 7 teams.
- Led on-call rotation for the booking-platform tier; reduced Sev-1 incidents from 6/quarter to 1/quarter.
- Built the merchant onboarding API in Java, reducing time-to-first-transaction from 4 days to 11 minutes for 80% of applicants.
- Implemented address-validation service handling 12M requests/day; sustained 99.99% uptime over 18 months.
- Drove adoption of OpenTelemetry across 9 services; cut mean-time-to-detect (MTTD) from 14 min to 90 sec.
Education
Focus: distributed systems, machine learning. GPA 3.94/4.0. TA for CS 244B (Distributed Systems).
Magna cum laude · Dean's List 8 semesters · ACM ICPC regional finalist.
Projects
Open-source distributed rate limiter written in Rust. 4.2k★ on GitHub, used by 8 companies in production. Sub-millisecond p99 for token-bucket and sliding-window algorithms.
Semantic caching layer for Claude / OpenAI APIs — cuts inference cost 40% with <0.5% accuracy loss. Featured in The Sequence newsletter (15k subscribers).
CNCF Sandbox project. Co-authored the cost-aware HPA controller and shipped the dashboard plugin used by 60+ orgs to right-size Kubernetes clusters.
Awards
Top 1% of engineers globally — awarded for the payment-routing migration.
Won grand prize (out of 240 teams) for an experiment-platform prototype shipped to production within 6 weeks.
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