During a two-month period, Die worked on the Dauphinsss/Redibo-Frontend and Redibo-Backend repositories, delivering end-to-end calendar and reservation management features for vehicle scheduling. He implemented a calendar view with availability filtering and sorting, integrating backend data retrieval using Node.js, TypeScript, and React. Die refactored user profile, vehicle management, and review components, improving UI/UX and enforcing role-based access control for host workflows. His backend contributions included new API endpoints for calendar data and enhanced data consistency across the stack. The work resulted in more reliable scheduling, streamlined reservation flows, and maintainable code, demonstrating depth in both frontend and backend engineering.