Worked on backend development and system programming for the allenai/dolma repository, focusing on improving cache integrity within S3 workflows. Addressed a bug in the cache eviction process by correcting the finalization path used during S3 deletion, ensuring that cache entries reference the original S3 source rather than a converted local path. This adjustment prevents accidental deletion of unrelated local files and reduces the risk of data loss during cache eviction. The solution was implemented in Rust, leveraging strong system programming practices to enhance reliability and maintainability of the S3-backed cache system without introducing new features during the development period.