Worked on the datastax/cassandra repository to address stability issues in the ChunkCache component, focusing on backend development with Java. The main contribution involved reverting a recent ChunkCache Key improvement after identifying that hash collisions were causing failures in AFS functional tests for SAI. This rollback restored test reliability and ensured predictable performance. The developer thoroughly analyzed the root cause of the collisions and documented a plan for a more robust, collision-resilient solution in future work. Throughout the process, they prioritized reliability and clear documentation, demonstrating a methodical approach to maintaining and improving backend systems in a complex Java environment.