During February 2026, Sam Glover enhanced the reliability and performance of the health check subsystem in the BerriAI/litellm repository. He developed a concurrency control mechanism in Python to cap the number of simultaneous health checks, addressing resource contention during peak loads. This involved updating backend logic to enforce concurrency limits, modifying Helm charts and Kubernetes deployment configurations to support the new policy, and implementing asynchronous programming techniques. Sam also created targeted tests to validate system behavior under concurrency constraints. The work demonstrated depth in backend development and deployment practices, resulting in improved predictability and stability for production environments.