Over a two-month period, contributed to the KMUTT-CampusLink project by delivering features and fixes across both campus-client and campus-server repositories. Focused on enhancing the transportation booking experience, this work included a UI refresh, centralized API services using JavaScript and React, and robust backend endpoints with Node.js and Prisma ORM. Implemented role-based navigation, secure authentication and authorization, and booking flows with CRUD operations and QR code confirmation. Addressed stale data issues and improved error handling for reliability. Emphasized maintainability through component-based architecture, dependency management, and test scaffolds, resulting in a more secure, user-friendly, and scalable application foundation.