Worked on the shaka-project/shaka-player repository to enhance the robustness of manifest parsing by implementing case-insensitive MIME type matching within the ManifestParser. This feature normalized incoming MIME types to lowercase before selecting the appropriate parser, addressing playback failures caused by inconsistent MIME casing across platforms. The solution included comprehensive unit tests to validate behavior with various MIME case variants, ensuring reliability and preventing regressions. Demonstrated strong skills in JavaScript, front end development, and unit testing while collaborating with the team. The work improved cross-platform reliability and maintainability of MIME type handling, resulting in smoother user experiences and easier parser management.