In November 2025, Galina Grodetskaya refactored the concurrency control mechanism for file fetching in the TUM-Dev/gocast repository. She replaced inflight locks with a singleflight approach, leveraging Go’s concurrency primitives to improve both reliability and performance in file retrieval workflows. This change reduced the risk of deadlocks and enhanced fetch efficiency, directly addressing maintainability and dependency health. Galina updated module dependencies to ensure compatibility with the new architecture, demonstrating a strong grasp of API development and concurrent programming in Go. Her work focused on deep, targeted improvements rather than broad feature additions, reflecting thoughtful engineering and attention to long-term code health.