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Enterprise API Gateway

A NestJS-based API gateway providing centralized authentication, rate limiting, request transformation, and intelligent routing for a microservices ecosystem.

10K req/sec
Throughput
JWT + RBAC
Auth
Redis Layer
Caching

The Challenge

As the microservices ecosystem grew, each service independently handled authentication, rate limiting, and CORS — creating security inconsistencies and duplicated logic across services.

My Approach

Built a centralized API gateway with NestJS that acts as a single entry point. Implemented JWT validation, role-based access control, Redis-backed rate limiting, and request/response transformation. Dockerized for easy deployment.

Tech Stack

NestJSDockerJWTRedisTypeScriptNginx

Key Outcomes

  • Centralized authentication and authorization for all microservices
  • Handling 10K+ requests per second with Redis-backed rate limiting
  • Reduced duplicate auth code across 8+ services
  • Implemented comprehensive request logging and monitoring

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