Worked on targeted Rust compilation caching for the mozilla/sccache repository, delivering per-target cache keys by integrating Rust target JSON specifications into both hashing and argument parsing. This approach ensured that compilations for different targets were cached separately, preventing cross-target cache collisions and improving build performance, especially in multi-target environments. Added robust tests for target parsing to verify correct behavior. Later, contributed to the mib1185/homeassistant-core repository by enhancing the Kostal Plenticore integration in Python, centralizing DcCheck state handling within PlenticoreDataFormatter to improve data consistency and maintainability. Demonstrated skills in caching, compiler internals, backend development, Rust, and Python.