Worked on the apache/airflow repository to enhance the SparkSubmitHook by implementing multi-protocol master URL construction, addressing the need for reliable connections across diverse cluster protocols. Leveraged Python and backend development skills to add support for multiple URI formats, which increased compatibility and reduced manual configuration for users. Updated documentation to clearly describe the new URL construction logic and supported formats, improving onboarding and maintainability. Fixed a longstanding bug related to master URL construction for various protocols, directly improving configuration correctness and user experience in Spark-based workflows. Applied unit testing to ensure robust functionality and maintain high code quality throughout the process.