A simple RESTful Product Management API built using Spring Boot and Spring Data JPA. This project demonstrates the implementation of CRUD (Create, Read, Update, Delete) operations using a layered ...

A production-style e-commerce REST API built with Spring Boot, featuring JWT-based authentication, role-based authorization, and a complete shopping flow from product catalog to order placement.

You check `EXPLAIN` during code review and find no slow queries, yet in production, hundreds of SQL statements are being executed. This is the N+1 problem. Even if your index design is correct, ...