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• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.

• Rebuilt the checkout pricing service in Java and Spring Boot, cutting p95 latency from 820 ms to 210 ms during sale traffic.
• Designed the REST and event APIs for split payments, now used by 3 teams and 40% of orders.
• Moved 14 services to Kubernetes with Helm charts and GitHub Actions, taking deploys from weekly to daily.
• Mentored 2 junior engineers through their first on-call rotations.

• Built the invoicing dashboard in React and TypeScript used by 18,000 small businesses.
• Wrote a PostgreSQL query layer with caching in Redis that removed 60% of database reads.
• Raised test coverage on the billing module from 35% to 85% and stopped a run of repeat bugs.

Token-bucket rate limiter library with 600 GitHub stars, used in production by two startups.