seniorJava
How do you design a highly available API Gateway in microservices?
Updated May 6, 2026
Short answer
An API Gateway handles routing, authentication, rate limiting, and load balancing with redundancy for high availability.
Deep explanation
It sits at the edge of the system, using multiple instances behind a load balancer. It handles JWT validation, request routing, throttling, and circuit breaking. Tools like Spring Cloud Gateway or Kong are commonly used.
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