Spring Boot – CRUD REST API
Every serious backend application — whether it’s powering a fintech platform, an e‑commerce giant, or a SaaS startup — rests on one timeless principle: CRUD. Create, Read, Update, Delete.
It may sound simple, but CRUD is the backbone of reliability. Without it, you can’t store user data, retrieve product catalogs, update transactions, or remove outdated records. In this guide, we’ll walk through how to build a CRUD REST API using Spring Boot, Spring Data JPA, and PostgreSQL. This is the foundation every backend engineer should master.