During two months on KMUTT-CampusLink’s campus-client and campus-server repositories, Hejdula delivered a robust transportation booking system with role-based navigation and secure booking flows. They centralized API interactions using JavaScript and Node.js, implemented RESTful endpoints for trip and booking management, and enhanced UI/UX with React. Their work included authentication, authorization, and error handling to ensure reliable and secure user experiences. Hejdula refactored backend logic with Prisma ORM for maintainable data access and improved build stability through dependency management. The resulting system streamlined booking operations, personalized navigation, and provided a solid foundation for future analytics and feature expansion across both repositories.