P. Andhika contributed to the cowprotocol/cowswap and cowprotocol/services repositories by delivering targeted UI enhancements and codebase improvements over two months. They standardized error handling in Rust by refactoring fallible constructors to use try_new, improving code clarity and reliability. In the cowswap explorer, Andhika refined React components such as ToggleFilter and DetailsTable, enhancing order detail presentation, filtering, and responsive design with CSS and Styled Components. They also addressed navigation issues by synchronizing URL state with tab selection, ensuring consistent user experience. Their work demonstrated a thoughtful approach to maintainability, usability, and cross-device compatibility in frontend and backend systems.