Spring Java Web App Development

I'm looking for an experienced Java developer to build a web application using the Spring framework. The app needs to support user authentication, data management, and reporting and analytics functionalities.

Key Requirements:
- Robust user authentication system
- Comprehensive data management capabilities
- Advanced reporting and analytics features

Ideal skills and experience:
- Strong proficiency in Java and Spring framework
- Experience in developing secure authentication mechanisms
- Expertise in data management and analytics tools
- Familiarity with web application architecture and design principles
- Ability to write clean, maintainable code and work collaboratively

Please provide your portfolio and relevant project experience.