API Gateway & Microservices

A performant gateway that orchestrates traffic across a constellation of microservices with strong governance.

Features

• Authenticates requests using JWT tokens and enforces role policies.
• Applies rate limiting, quotas, and circuit-breaking at the edge.
• Handles request/response transformations (REST ↔︎ gRPC) with schema validation.
• Streams metrics, traces, and structured logs into Prometheus and Grafana.

Implementation Notes

• Built in Go for lightweight concurrency and minimal latency overhead.
• Service discovery plugs into Consul; routing tables are cached locally with TTL invalidation.
• A Lua scripting layer enables dynamic policy adjustments without redeploying.

Setup

1. Copy
   terminal

   Copy

   config.example.yaml
   to
   terminal

   Copy

   config.yaml
   and configure upstream services.
2. Run
   terminal

   Copy

   make run
   to start the gateway locally with hot reload.
3. Use the bundled CLI to register upstream services and configure rate-limiting rules.

Monitoring

Dashboards include latency histograms, request distribution, and breaker trip counts. Alerts fire through PagerDuty when error budgets are threatened.