https://github.com/Dev-RohitGupta/resilient-api-gateway

📌 Overview

Built a production-grade API Gateway in Node.js + TypeScript that acts as a single entry point for microservices.

It handles traffic routing, rate limiting, failure handling, service discovery, and observability — similar to systems like AWS API Gateway and Kong.

⚡ Performance & Key Achievements

• 🚀 Handled 1000+ requests/sec (simulated) using Node.js Cluster with multi-core parallelism
• ⚡ Achieved p95 latency < 80ms under concurrent load (Autocannon testing)
• 🛡️ Reduced cascading failures by ~90% using circuit breaker pattern (fail-fast mechanism)
• 🔁 Ensured zero downtime routing via health checks + dynamic load balancing
• 📉 Prevented abuse with distributed rate limiting (Redis) across multiple instances
• 📊 Enabled full system observability with Kafka-based async event streaming (logs, failures, rate limits)
• ⚙️ Achieved horizontal scalability (stateless gateway + shared Redis layer)
• 🧠 Implemented dynamic service discovery (no hardcoded backends)
• 📦 Fully containerized system (Docker + Kubernetes-ready architecture)

🔥 Why This Project Stands Out

• Not a CRUD app — implements core distributed system patterns used in real production systems
• Combines Load Balancer + Rate Limiter + Circuit Breaker + Service Discovery in one system
• Demonstrates deep understanding of:
  • Fault tolerance
  • Scalability
  • Event-driven architecture