Worked on the pingcap/tidb repository to enhance the reliability of GCS-backed storage operations by addressing a persistent issue with file deletion. Implemented a targeted fix in Go that ensures attempts to delete non-existent files from Google Cloud Storage no longer result in spurious errors, thereby reducing unnecessary CI failures and deployment risks. This backend development effort improved the stability of storage interactions for users and contributed to smoother continuous integration workflows. The solution was carefully linked to relevant issues for traceability and release readiness, reflecting a methodical approach to maintenance and quality assurance within a complex distributed database environment.