Worked across core React Native repositories to enhance Android stability, performance, and developer experience. Addressed runtime crashes in software-mansion/react-native-gesture-handler by implementing idempotent module updates and registry guards for animation safety. Improved layout consistency in software-mansion/react-native-screens by refining header handling during transitions. In facebook/react-native, restored secure text update behavior to maintain password reveal timing in Android TextInput. Optimized animated component host lookups in software-mansion/react-native-reanimated by preferring resolved references, increasing accuracy and speed. Updated facebook/react-native-website documentation to clarify platform creation with the New Architecture. Utilized Kotlin, TypeScript, and unit testing to ensure robust, maintainable solutions.