During a two-month period, this developer focused on backend stability and cache reliability for the sglang project, contributing to both the ping1jing2/sglang and yhyang201/sglang repositories. Working primarily in Python, they addressed critical bugs in the HiMambaRadixCache, refining eviction logic to prevent stale assertions and runtime errors when handling nodes with children. Their technical approach emphasized robust cache management, including safeguarding host-referenced nodes during tombstone cleanup to avoid inadvertent data loss. Through careful unit testing and collaborative code reviews, the developer improved cache integrity and system stability, demonstrating depth in backend development and a strong understanding of complex caching mechanisms.