During March 2026, Praveen Nookala focused on backend stability for the BerriAI/litellm repository, addressing a critical issue in the caching layer. He fixed a bug in the DualCache asynchronous methods, ensuring that the default in-memory TTL was correctly injected during async cache operations. This change prevented stale data and reduced the risk of budget overages for end users. Praveen reinforced the solution by adding targeted tests to validate TTL behavior and guard against regressions. His work leveraged Python and asynchronous programming techniques, demonstrating depth in caching and backend development while prioritizing reliability and maintainability in production environments.