Alex Toma developed and enhanced core features for the vodaioan03/UBB-SE-2025-927-1 repository, focusing on scalable backend systems and robust UI/UX. He improved data modeling for enrollments and exercises using C# and ASP.NET Core, introducing foreign key annotations and DTO-based APIs to streamline client integration. Alex also delivered an admin dashboard, expanded the exercise ecosystem with multiple question types, and stabilized the global theme system for consistent user experience. His work included comprehensive unit testing, codebase cleanup, and advanced filtering for course discovery, demonstrating depth in both backend and frontend development while ensuring maintainable, testable, and accessible solutions.