API Gateway

A scalable API gateway solution that handles request routing, rate limiting, authentication, and monitoring. Built for microservices architecture with support for multiple backend services.

Features

• Request Routing: Intelligent routing to multiple backend services
• Rate Limiting: Per-user and per-IP rate limiting with Redis
• Authentication: JWT-based authentication and API key management
• Request Transformation: Modify requests before forwarding
• Response Caching: Cache responses to reduce backend load
• Monitoring: Real-time metrics and logging
• Load Balancing: Distribute traffic across multiple instances

Technologies

• Node.js: Runtime environment
• Express: Web application framework
• Redis: Caching and rate limiting
• JWT: Token-based authentication
• Docker: Containerization
• Kubernetes: Orchestration (optional)
• Prometheus: Metrics collection
• Grafana: Metrics visualization

Architecture

The gateway sits between clients and backend services, handling:

• Request validation
• Authentication and authorization
• Rate limiting
• Request/response transformation
• Error handling
• Logging and monitoring

Performance

Optimized for high throughput:

• Connection pooling
• Request batching
• Efficient caching strategies
• Horizontal scaling support

Security

Multiple security layers:

• HTTPS/TLS encryption
• API key rotation
• IP whitelisting/blacklisting
• DDoS protection
• Request size limits

Getting Started

git clone https://github.com/yourusername/api-gateway
cd api-gateway
pnpm install
pnpm dev

Configuration

Configure routes and services in config/routes.json:

{
  "routes": [
    {
      "path": "/api/users",
      "backend": "http://user-service:3000"
    }
  ]
}

Deployment

Deployed using Docker containers with Kubernetes orchestration for high availability.