🟩 Use async I/O event-driven architecture — avoid thread blocking and maximize concurrency. 🟩 Adopt a high-performance protocol (gRPC / HTTP/2) — reduce overhead and improve throughput. 🟩 Cache aggressively at every layer — Redis/memcached to eliminate expensive DB hits. 🟩 Use horizontal scaling with stateless microservices — add more instances without worrying about shared state. 🟩 Put a global CDN Edge caching — serve most responses directly from the edge, reducing load on origin. 🟩 Intr