In April 2025, Romualdo enhanced the medic/cht-user-management repository by implementing a TTL-based caching system for remote places, focusing on data consistency and backend efficiency. He integrated node-cache with time-to-live and check period features, refactoring the caching logic to support proper invalidation and prevent redundant concurrent fetches for identical keys. By updating the add and clear methods, Romualdo ensured that cache entries are invalidated promptly, maintaining data freshness. His work leveraged JavaScript and TypeScript, drawing on skills in backend development, API integration, and caching. The depth of the solution addressed concurrency challenges and improved overall cache coherence within the system.