Web Application Development with Java

I'm seeking an experienced Java developer to create a web application using the Spring framework. The application should include the following features:

- User Authentication: Implement secure and efficient user login and registration systems.
- Database Integration: Establish a reliable connection to a database for data storage and retrieval.
- Payment Processing: Incorporate a secure, user-friendly payment processing system.

Ideal candidates should have a strong background in Java and Spring, with proven experience in web application development. Familiarity with user authentication systems, database management, and payment processing integrations is essential.