Developed and maintained the Matic Services Android app (500k+ users), improving stability, performance, and UX—leading to a 20% increase in user Read more engagement (Google Analytics). Refactored the app's architecture to adopt Unidirectional Data Flow (UDF), improving maintainability and achieving a 30% performance gain. Achieved a ~100% crash-free rate using proactive issue tracking via Firebase Crashlytics. Implemented and optimized CI/CD pipelines using GitHub Actions and Fastlane, reducing deployment time by 40%. Modernized IonoView's Driver and Service Provider apps by upgrading libraries and optimizing location permissions to meet Play Store policies. Led the development of high-impact features: redesigned checkout flow, in-app updates, in-app reviews—collaborating closely with product teams to align tech efforts with business goals. Managed the full release pipeline: shared development builds with QA via Firebase App Distribution, used Internal App Sharing and Internal Testing tracks on Google Play Console for controlled production testing, and conducted staged rollouts for production releases. Integrated and maintained Huawei SDKs and published app updates to Huawei AppGallery, ensuring compatibility across HMS and GMS environments.