Arijan contributed to both YaLTeR/niri and ppy/osu, focusing on user interface stability and accessibility. In YaLTeR/niri, Arijan resolved a regression where the cursor could remain hidden after screenshots by resetting the cursor visibility state and queuing a redraw, demonstrating careful UI state management and render-cycle debugging using Rust. For ppy/osu, Arijan enhanced skin navigation by adding keyboard shortcuts, consolidating cycling logic, and updating localization, all implemented in C#. These changes improved user experience, accessibility, and maintainability. Arijan’s work reflected a thoughtful approach to code quality, UI/UX design, and system programming within established open-source projects.