Worked on stabilizing and enhancing the block/buzz repository, focusing on both mobile and desktop platforms. Delivered multiple Buzz Mobile releases, introducing features such as improved @mention autocomplete, profile sheet access, and support for pairing relays, while addressing critical bugs like buzz:// link handling and image upload sanitization. Optimized CI/CD pipelines by reducing unnecessary test rebuilds and implemented external release signing for APKs to strengthen security and reliability. Leveraged technologies including Flutter, Kotlin, and GitHub Actions, with a strong emphasis on mobile development, UI/UX improvements, and release management. Prioritized developer efficiency and product reliability through targeted bug fixes and process enhancements.