About
Senior mobile engineer with 6 years of experience shipping high-quality React Native applications to the App Store and Google Play. Expert in native module development, offline-first architectures, and delivering polished, performant UIs on mid-range hardware. Holds a 4.8★ average App Store rating across published apps.
Languages: English, Ukrainian, Russian
Technical Expertise
Primary stack
React NativeTypeScriptExpoiOSAndroidWatermelonDBFirebase
Also works with
Redux ToolkitReact NavigationReanimated 3Shopify Flash ListDetoxFastlaneEAS BuildCodePushSentryCrashlyticsMapbox
Experience
- Senior Mobile EngineerHired2021 – Present
- Shipped a React Native super-app (150K+ installs) with biometric auth, background geolocation, and native camera — all via custom native bridges
- Implemented offline-first sync using WatermelonDB with deterministic conflict resolution for field-use in low-connectivity environments
- Reduced cold-start time from 3.4 s to under 1.8 s through lazy loading, Hermes optimisation, and bundle splitting
- React Native DeveloperFintech Mobile Startup2019 – 2021
- Built and maintained a cross-platform trading app with real-time WebSocket price feeds and animated charting components
- Introduced Detox E2E test coverage across 40+ critical user journeys, catching regressions before App Store submissions
- Mobile DeveloperDigital Agency2018 – 2019
- Developed 3 client-facing React Native apps from design handoff to App Store release within 12-week project cycles
Education & Certifications
B.Sc. Software Engineering
KPI Kyiv · 2018