Developed a secure, scalable user management and governance system across backend and frontend in the bena-sudo/rag2daw2025 and rag2daw2025frontend repositories. Focused on authentication, authorization, and auditing, the work included implementing role-based access control, user lifecycle management, and admin workflows. Leveraged Java Spring Boot, Angular, and SQL to deliver features such as user registration with phone support, account blocking, and enhanced error handling. Introduced auditing endpoints, refined database schema, and improved admin user management with pagination and filtering. Enhanced frontend authentication feedback and created robust form validation, resulting in a stable, maintainable foundation for secure user operations and administration.