Worked on the nodejs/node repository to enhance backend stability by addressing a critical bug in core URL handling. Focused on the PathToFileURL function, the developer implemented a fix in C++ and JavaScript to prevent application crashes when processing malformed UNC hostnames, as highlighted in Node.js issue #62546. The solution involved robust input validation and error handling, ensuring that invalid file URLs are managed safely rather than causing failures. This change, reviewed by multiple contributors, improved reliability for enterprise environments that generate file URLs from user or external sources, and strengthened the overall resilience of backend systems relying on UNC paths.