Rate Limiting in Spring Boot REST APIs: Bucket4j + Redis (opens in new tab)

Published 2026-06-04 by Shubham Bhati — Backend Engineer (Java 17, Spring Boot, Microservices). We've all been there - our Spring Boot REST API is performing well, handling a decent amount of traffic, when suddenly we're hit with a massive influx of requests, causing our servers to slow down or even crash. This is where spring boot rate limiting comes into play, helping us protect our APIs from abuse and ensuring a smooth user experience. In our production environment, we've seen firsthand th...