3rd YearAdvancedNetworking 5-7 weeks
API Gateway with Rate Limiting
A reverse-proxy API gateway that authenticates requests, applies per-client rate limits, routes to upstream services, and logs metrics.
Node.jsExpressRedisJWTDocker
Find GitHub repos & source code →How to build it — step by step
- 1Proxy + routing: Route incoming requests to configured upstream services with path rules.
- 2Auth: Validate API keys/JWTs and attach client identity to each request.
- 3Rate limiting: Implement token-bucket/sliding-window limits per client in Redis.
- 4Observability: Record latency, status codes, and throttle events; expose a metrics endpoint.
Key features to implement
- ✓Reverse-proxy routing
- ✓API-key/JWT auth
- ✓Token-bucket rate limiting
- ✓Per-client quotas
- ✓Metrics and logging
💡 Unique twist to stand out
Add circuit-breaking that temporarily stops routing to an upstream that is failing, with automatic recovery probing.
🎓 What you'll learn
API gateway patterns, rate-limiting algorithms, distributed counters, and resilience patterns.