• Built Java/Spring Boot backend on AWS for a bilingual EdTech platform serving 50K+ users

• Achieved 99% uptime through IAM controls, workload isolation, and async design trade-offs

• Cut mean time to recovery by 40% with Prometheus, Grafana, and OpenTelemetry

• Built checkout APIs with Spring Boot and React handling 10,000+ daily sessions

• Implemented distributed locks and idempotency keys for order integrity

• Cut p95 latency by 20% through query optimization and async pipelines

• Scaled payment microservices on AWS processing 2M+ daily API calls (40% throughput gain, 30% latency reduction)

• Hardened reliability with retry logic, Redis caching, circuit breakers, and async handlers

• Automated CI/CD with Docker, Kubernetes, and Jenkins, cutting releases from 2 hours to 15 minutes