Developed and enhanced both backend and frontend systems for the fdrpkm68 repositories, focusing on robust domain logic, data integrity, and user experience. On the backend, established transactional group and house modules with secure authentication, event-time access controls, and capacity-aware workshop flows using TypeScript, Node.js, and Prisma ORM. The frontend work delivered the complete RPKM feature set, including workshop flows, user profile navigation, and error handling, leveraging React and Astro. Code quality was maintained through rigorous linting, refactoring, and CI/CD improvements. Addressed six bugs and shipped twenty-four features, demonstrating a comprehensive approach to full-stack web application development and maintenance.