5 API calls in Java Sprint Boot - Postgres

I need a developer who can create 5 API calls in Java Spring Boot with a Postgres database. The purpose of these API calls is to retrieve product information from the database. The retrieved data should be in JSON format.

Ideal skills and experience:
- Proficiency in Java Spring Boot
- Experience working with Postgres databases
- Knowledge of API development and RESTful principles
- Familiarity with JSON data format