Ilinca Mares developed core backend features for the HorvatAris/UBB-SE-2025-924-1 and UBB-SE-2025-Steam repositories, focusing on scalable user management, in-game store systems, and news management APIs. She designed and implemented RESTful services using ASP.NET Core and Entity Framework Core, establishing robust data models, repository patterns, and role-based access control. Ilinca also introduced comprehensive unit testing with XUnit and interface-based mocks to improve reliability and maintainability. Her work included database migrations, CRUD endpoints, and performance optimizations, demonstrating depth in backend architecture and test infrastructure. The solutions addressed foundational requirements for user, transaction, and content management workflows.