Mohammad Eftekhari refactored time management within the Messenger component of the symfony/symfony repository, focusing on improving reliability and testability. He replaced native PHP time constructs in DelayStamp and RedeliveryStamp with the Clock abstraction, enabling deterministic tests and reducing future maintenance risks. This backend development work, using PHP and Symfony, isolated time-related logic to a single dependency, which enhances code consistency and lays a foundation for future time-based features. By aligning time stamps with Clock, Mohammad improved test coverage and made the Messenger component’s time handling more robust, addressing both current and anticipated needs for maintainable, reliable code.