Worked on the openfga/openfga repository to address a critical issue in the InMemoryCacheController, focusing on improving cache invalidation timing for Check responses after store writes. Applied Go and backend development expertise to refine the cache controller logic, ensuring cached data remained accurate and up-to-date. Enhanced the configuration schema descriptions to minimize misconfigurations and streamline developer onboarding. Expanded the unit testing suite to comprehensively validate the new invalidation behavior, covering a range of edge cases. The work demonstrated a methodical approach to backend reliability, emphasizing robust caching strategies and thorough testing to maintain correctness and freshness in the system’s responses.