Worked on backend reliability improvements for the OpenListTeam/OpenList repository, focusing on download task status updates. Addressed a persistent issue where failed status updates could trigger infinite retry loops, leading to unnecessary system load and delayed incident response. Implemented a retry limiter in Go that caps status update attempts at five, after which the function returns an explicit error to enhance error handling and observability. This approach reduced the risk of resource exhaustion and improved the stability of download task processing. The work demonstrated attention to robust error handling and backend development practices, contributing to more maintainable and resilient system behavior.