Full-Stack Developer for Java Spring Boot API and AI integration- Individual developer- URGENT

I am looking for a developer to build a Java Spring Boot API for a web application targeted at the general public. I need someone to write the API for me. The application will have the following key features: - User Authentication and Authorization: The application should allow users to create accounts, log in securely, and manage their personal data. - Real-Time Data Processing: The API needs to handle data updates in real-time and ensure that users are provided with current information. - The API should support comprehensive CRUD (Create, Read, Update, Delete) operations for managing resources. - The application should include a search functionality to allow users to quickly find the information they need. - Implement role-based access controls to restrict access to certain parts of the application based on user roles. - Include logging and monitoring to track user activities and system performance. - Provide robust error handling to ensure that the system can gracefully handle unexpected issues. - Include data validation to ensure that the data being processed is accurate and meets specific criteria. The ideal candidate should have: - Proficiency in Java and Spring Boot: Demonstrated experience building robust, scalable APIs using Java Spring Boot. - Strong understanding of user authentication and authorization protocols. - Prior experience integrating payment gateways into web applications. - Solid understanding of real-time data processing and event handling.