RESTful API Development with Java Spring Boot

I'm in need of a skilled Java Spring Boot developer to create a robust RESTful API for a web application.

Key requirements:
- Implement CRUD operations within the API
- Integrate the API with various third-party APIs and Database servers
- Ensure user authentication is handled securely

The ideal candidate would have:
- Extensive experience with Java Spring Boot
- Proven track record in RESTful API development
- Strong understanding of CRUD operations
- Prior experience integrating with third-party APIs and Database servers
- Knowledge in implementing secure user authentication

Please include examples of relevant previous work in your proposal.