Oleksandr L.

Highly skilled Senior Mobile Developer with 6+ years of experience specializing in React Native and cross-platform app development. Proven success in building and launching high-quality applications on the App Store and Google Play, reaching thousands of users across industries including e-commerce, education, gaming, wellness, and utilities.Recognized for leading development teams, optimizing performance, and designing scalable architectures using FSD, MVC, MVVM, and MVP patterns. Strong expertise in integrating real-time communication, subscription models, cloud services, analytics, and monetization strategies.Core CompetenciesMobile Development: React Native, Expo, Firebase, Google Cloud Platform, Socket.IOFrontend Development: React.js, Next.js, TypeScript, Redux Toolkit, MobX, Apollo GraphQL, TanStack Query, ZustandArchitecture & Code Quality: Feature-Sliced Design (FSD), MVC/MVVM/MVP, Jest, RN Testing Library, Performance Optimization, Sentry, DatadogMonetization & Integrations: Stripe, Qonversion, React Native IAP, IronSource, AppLovin, Push-notifications (OneSignal, Firebase), deep linking, AppsflyerAnalytics & Tracking: Firebase Analytics, Facebook Analytics, AmplitudeNotable AchievementsTeam Leadership: Managed and mentored mobile developers to deliver projects on time with strong collaboration.Product Delivery: Developed and published multiple apps (casual games, wellness, clothing e-commerce, utilities) to App Store and Google Play.Performance & UX: Enhanced app performance with optimized rendering, reduced load times, and smooth animations.Advanced Features: Implemented speech-to-text, authentication (Google, Apple, Facebook, GitHub), real-time chat, and biometric login.Architecture: Designed and implemented scalable mobile architectures with FSD and MV* patterns to ensure maintainability and rapid feature development.