Worked on stabilizing Android development workflows across the mrousavy/expo and expo/expo repositories, focusing on targeted bug fixes rather than feature delivery. Addressed a ClassCastException in the headless app loader for older React Native architectures by refactoring resource access to use context.applicationContext, which improved background task lifecycle management and reduced crash risk on legacy devices. Additionally, resolved Android build failures in expo-file-system by correcting the placement of AndroidManifest.xml, ensuring reliable build processes and smoother developer experience. Leveraged expertise in Android development, React Native, Java, and Kotlin to deliver precise, low-risk changes that enhanced maintainability and stability in complex mobile environments.