Worked on enhancing the StockApp repository by developing a comprehensive suite of unit tests for five core backend services, including InvestmentsService, LoanRequestService, MessagesService, NewsService, and StockPageService. Focused on ensuring robust coverage of success scenarios, error handling, and edge cases, the work leveraged C#, MSTest, and mocking techniques to improve code reliability and maintainability. By strengthening the automated test suite, the developer enabled faster verification of changes and reduced production risk, supporting safer deployments and more efficient future development. This effort contributed to a more reliable CI feedback loop and accelerated the process of debugging and feature iteration.