Cyan Sun

At Citi Financial Information Services (China) Co., Ltd. (CSTC), I led the sidecar transformation of a legacy WebSphere system into Spring Boot microservices and built a high-availability API gateway with Spring Cloud Gateway. It supported tens of thousands of QPS under multi-instance deployment.

On the Supply Chain Finance System, I led the microservices transformation and designed gateway capabilities including permission injection, mutual TLS, and Redis caching. I also handled production issues such as deadlocks, OOM, and performance bottlenecks.

For the Bond Competitive Bidding Platform, I built a Kafka-powered backend data pipeline and WebSocket push logic. Redis-based caching improved performance by 30%.

At China Merchants Bank Network Technology, I built backend services for a cloud operations platform and delivered 30+ APIs for an intelligent circuit management system supporting 40,000 circuits. I also use Codex and GitHub Copilot to accelerate development, and recently earned the System Integration & Project Management certificate and passed the Securities Industry Qualification exam.