Backend Developer (NodeJS, Goalng, Python, API, MySQL)

Job Objective:Design, implement, and optimize CDN, reverse proxy, caching, and backend processing strategies to ensure:Fast response timeOptimal load distributionSignificant reduction of database and application-layer trafficKey Responsibilities:🔹 Backend API & Application Optimization:Optimize heavy-load, high-concurrency APIs (Golang/NodeJS).Refactor CPU-blocking or slow I/O logic.Measure and improve performance using tools such as APM, Prometheus, Grafana, and Sentry.🔹 Multi-layer Caching Architecture:Edge Caching (Cloudflare CDN): Configure Cache-Control, Workers, Page Rules, etc.Reverse Proxy Caching (NGINX): Implement dynamic caching (micro-cache) and API route caching for GET/HEAD.Application Layer Caching: Redis, in-memory caching (LRU, TTL logic).Database Result Caching: Redis cache + key versioning to reduce duplicate queries.🔹 Smart Cache Integration & Invalidation:Implement event-driven cache invalidation based on data changes.Apply “stale-while-revalidate” or “cache-aside” caching patterns.🔹 Cloud & CI/CD for Performance Support:Configure autoscaling (CPU/Memory, HPA on K8s).Collaborate with DevOps on GKE architecture and Cloudflare rules.Build performance testing scripts (k6, Locust, Artillery, etc.).