Worked on the mixxxdj/mixxx repository over a two-month period, focusing on targeted bug fixes to improve hardware compatibility and user interface consistency. Addressed a handler assignment issue in the Numark NS6II controller mapping, restoring correct pad mode functionality through careful debugging and JavaScript development. In the following month, concentrated on front-end development and UI/UX by correcting a CSS parsing error in the LateNight skin, which resolved FxToggleButton styling and restored active state coloring for FxUnit4. Emphasized code quality and regression prevention throughout, leveraging skills in embedded systems, JavaScript, and CSS to deliver stable, maintainable improvements without introducing new features.