Responsible for backend microservices architecture and database performance. Implemented distributed rate limiting and multi-tier Redis caching to sustain platform throughput under traffic spikes. Optimized HikariCP connection pools to eliminate connection timeouts. Tuned Azure Cosmos DB partition keys and query indexing across PostgreSQL and MongoDB to maintain sub-50ms latency. Modernized core services from JDK 8 to JDK 17 and built asynchronous data pipelines in Python with FastAPI.

Engineered a low-latency Java socket service decoding raw binary telemetry packets from over 1,000 cell towers over TCP/IP in sub-seconds. Implemented idempotent payment APIs with unique request hashing to prevent duplicate transaction settlements during network retries. Migrated production database infrastructure from Supabase to Azure SQL, restructuring schemas to cut p95 query latency by 35%. Built REST APIs with Spring Security and JWT, writing test suites with JUnit 5 and Mockito.