Worked on the TUM-Dev/gocast repository, focusing on refactoring the concurrency control mechanism for file fetching workflows. The approach involved replacing traditional inflight locks with Go’s singleflight package, which streamlined concurrent operations and reduced the risk of deadlocks during file retrieval. This change improved both reliability and performance, ensuring more efficient resource usage. The work also included updating module dependencies to maintain compatibility and support ongoing maintainability. Leveraging skills in API development, Go, and concurrent programming, the developer delivered a targeted feature that addressed a core architectural concern, demonstrating depth in concurrency management within a production codebase over the month.