Worked on backend stability and efficiency within the cdce8p/ha-core repository, focusing on the FireServiceRotaClient component. Addressed a bug by refactoring the asynchronous job execution flow, grouping sequential async_add_executor_job calls to streamline token refresh operations. This approach reduced the risk of errors and improved reliability for scheduled tasks under load. Utilized Python’s asynchronous programming patterns and executor-based concurrency to enhance error handling and token management. The changes resulted in a more robust and efficient task flow, minimizing potential retries and failures. Emphasized code maintainability and test coverage, contributing to smoother backend operations without introducing new features.