Java Spring Boot Web App Development -- 2

I need an experienced developer to build a new web application using Java, Spring Boot, MySQL, and microservices architecture.

Key features include:
- User authentication and authorization
- Payment processing

Ideal skills and experience:
- Proficiency in Java and Spring Boot
- Strong knowledge of MySQL
- Experience in developing microservices
- Familiarity with security protocols for user authentication
- Experience integrating payment processing systems

Please provide a portfolio showcasing similar projects. Looking forward to your bids!