Worked on the TanStack/router repository to deliver a feature enabling server functions to return null responses safely, addressing potential edge-case failures in routing workflows. The implementation focused on enhancing API reliability by ensuring that both GET and POST requests could gracefully handle null values without triggering errors. This was achieved through dedicated end-to-end testing and the introduction of a specialized test component to validate null response handling. Leveraging React for component development and TypeScript and JavaScript for server-side logic, the work improved test coverage and documentation, aligning with business goals of robust server function workflows and improved developer experience.