Tech Stack: Go, C++, PostgreSQL, gRPC, REST, Docker, Linux
• Engineered Go and C++ telemetry ingestion services for industrial PLCs; maintained consistent 600 RPS throughput during burst device-sync windows across distributed nodes
• Investigated burst-load latency incidents using pprof, trace data, and runtime profiling, isolating CPU hot paths and request-path bottlenecks that reduced p99 latency from ~400 ms to ~80 ms
• Profiled PostgreSQL query plans on a 10M-row time-series table where missing composite indexes caused dashboard timeouts; redesigned schema to use partitioned tables, cutting p95 read latency by 35%
• Caught a silent API contract violation during integration review, where an undocumented field removal in a gRPC response would have broken downstream compatibility before release
• Traced a serialization bottleneck in gRPC response encoding under burst traffic, replacing reflection-based marshaling with pre-generated protobuf code and cutting per-request allocation overhead by ~40%