Designing a Fault-Tolerant API Gateway in Go

Mon, 10 Aug 2026 00:00:00 +0000

Designing a Fault-Tolerant API Gateway in Go

An API gateway sits at an uncomfortable boundary.

It receives traffic from clients, but the work is usually performed somewhere else. Every request that passes through the gateway eventually depends on downstream services, networks, databases, caches, or other infrastructure.

That makes the gateway more than a reverse proxy.

It becomes one of the places where reliability decisions have to be made.

This is the problem I wanted to explore while building Flux-Gateway, a high-performance API gateway and reverse proxy written in Go.

Designing Fail-Fast Boundaries for Microservices

Sun, 09 Aug 2026 00:00:00 +0000

Designing Fail-Fast Boundaries for Microservices

One of the easiest mistakes to make in distributed systems is assuming that a failed request is simply a request that returned an error.

A timeout is more expensive.

The system may have spent seconds holding connections, goroutines, memory, and other resources before discovering that the dependency could not respond.

That is why fail-fast behavior is an important reliability mechanism.

Slow Failure Is Still Failure

Consider a request travelling through several services:

Microservices on Ikwuka Okoye

Designing a Fault-Tolerant API Gateway in Go