Published 2026-05-28 by Shubham Bhati — Backend Engineer (Java 17, Spring Boot, Microservices). As backend engineers, we've all been there - stuck with a REST API that's becoming increasingly cumbersome to maintain. At our company, we recently faced a similar issue with our user management API, which was built using Spring Boot 2.7 and Java 17. The API had grown to over 50 endpoints, and every new feature addition was a nightmare. That's when we started exploring GraphQL as an alternative, and after a thorough evaluation, we decided to go with a graphql spring boot tutorial to migrate our API. We chose Spring Boot 3.2 and Java 21 for the migration, and the results were astonishing - we reduced our p99 latency from 800ms to 120ms.…