Senior React Native Engineer / Team Lead at Buymeua

Led a team of 4 FE engineers (within a larger org of BE/QA/PM/CTO) on a Ukrainian e-commerce SaaS platform for dropshippers and retailers. Architected a shared frontend SDK to cut development costs, improved time-to-market by reusing shared hooks/components/entities, and chose published package distribution over a monorepo for independent app releases. Shipped a white-label B2C retail app (24 screens) end-to-end to app stores in 2 months using EAS Build and OTA updates with multi-environment setup. Rebuilt a dropshipping app (97 screens) with dual-mode switching (BuymEua vs supplier content), role-based pricing/feature/UI logic, and a product export builder for marketplaces. Investigated Android OOM crashes affecting ~1/3 of users, profiled the issue, delivered the fix via the delivery channel, and shipped JS image caching improvements over OTA, followed by engine downgrade in the next store release. Built custom native Swift modules exposed to React Native via Expo Modules, and set up

Senior React / React Native Engineer at Flawless Group

Hardened the app for a security-sensitive domain (secure token storage, encryption, jailbreak detection, screen privacy in background, code signing, and no secrets in codebase). Implemented domain-specific admin client features from scratch on top of a core repository, including tailored business logic and workflows across three verticals (cosmetics, real estate, food delivery). Migrated 10+ core admin web modules to a cross-platform client using React Native & Expo, expanding core web functionality to mobile. Maintained and optimized data-dense MLM admin dashboards using Redux Toolkit and React Navigation for predictable state management and smooth routing.