John Hagedorn contributed to the ucsb-cs156-s25/team02-s25-16 and ucsb-cs156-s25/proj-rec-s25-16 repositories by building robust admin workflows and improving data handling for recommendation letter management. He refactored the UCSB Organization API and implemented admin CRUD operations, aligning backend endpoints with frontend routing in React and Java. John enhanced test reliability by correcting Storybook import paths and introducing comprehensive mock data for UI components. He stabilized the codebase by centralizing type definitions and fixing JSON schema issues, ensuring safer deployments. His work demonstrated depth in API development, backend integration, and frontend testing, resulting in more maintainable and reliable systems.