Worked on the medic/cht-user-management repository to deliver cache expiry and concurrency improvements for remote places. Developed a TTL-based caching mechanism using node-cache in Node.js, refactoring the backend to support proper cache invalidation and prevent redundant concurrent fetches for identical keys. Updated the add and clear methods to align with the new caching strategy, ensuring that data remains fresh and consistent while reducing unnecessary backend load. Leveraged skills in API integration, backend development, and caching, utilizing both JavaScript and TypeScript. This work focused on enhancing data consistency and system efficiency through thoughtful engineering of cache management and concurrency safeguards.