Worked on the videolan/vlc repository to enhance application stability and user experience by addressing core bugs in C++ and Qt. Focused on improving data integrity by refactoring date handling in MLGroup to use QDateTime, preventing truncation issues and ensuring accurate data storage. Improved the logical correctness of hotkey preference evaluation by streamlining comparison logic, resolving a Coverity-identified defect. Enhanced the preferences reset workflow by ensuring Qt-specific settings are cleared, adding a restart prompt, and preventing widget position saves during reset. Demonstrated strong skills in C++ development, software debugging, and user interface design while prioritizing maintainability and cross-platform usability.