During March 2026, Calcoholado developed a thread-safe Car API level caching mechanism for the androidx/androidx repository, focusing on reducing I/O overhead and improving runtime performance for Android components. By implementing caching in Java, Calcoholado ensured that API level checks no longer required repeated disk access, which enhanced both startup speed and reliability under concurrent usage. The solution incorporated robust unit testing to validate the correctness of the caching logic and its thread-safety, demonstrating a methodical approach to quality assurance. This work showcased Calcoholado’s skills in Android development, Java, and unit testing, addressing performance and stability in a targeted feature.