During February 2025, Deng Lin focused on backend reliability for the ZoeyVid/NPMplus repository, addressing a recurring HTTP 500 error on the Stream List page. Working with JavaScript, Deng identified that type casting of the incoming_port variable was causing server crashes under load. By replacing integer casting with a direct string comparison, Deng ensured type-safe handling and improved backend stability. The targeted patch was delivered in a single commit, validated through CI and staging environments, and deployed to production with minimal risk. This work demonstrated Deng’s proficiency in backend development and rapid incident response, resulting in a more robust user experience.