Worked on the yhyang201/sglang repository to improve backend reliability by addressing a file descriptor leak in the HiCacheNixl transfer subsystem. Applied Python and unit testing skills to implement a targeted fix that ensures file descriptors are properly closed after each file transfer, reducing memory pressure and mitigating stability risks in long-running workflows. The solution focused on robust resource management, directly enhancing the reliability of file transfer operations. Collaborated on the codebase through a co-authored commit, demonstrating attention to code quality and review processes. The work delivered a low-impact, high-value improvement to the transfer pipeline without introducing new features.