Worked on the jellyfin/jellyfin repository to enhance reliability in streaming URL generation, focusing on backend development and API robustness using C#. Addressed a critical bug where malformed query strings in StreamInfo.ToUrl() caused 500 errors when accessed through reverse proxies, such as those used in Home Assistant ingress. Improved the query string construction logic by tracking the start of queries, ensuring correct parameter assembly, and preventing empty keys during parsing. Updated unit tests to reflect these changes and removed legacy workarounds, resulting in more stable deployments in proxy-heavy environments. Collaborated across teams to ensure comprehensive test coverage and maintainability.