Oleksandr P.

Need a mobile app that still works after launch, not just at demo day? I'm Oleksandr, a react native mobile developer and founder/lead engineer at Kultrix, an AI and Mobile App Studio in Lviv. I lead mobile app development that ships production-ready iOS and Android apps that survive real users - numerous are live on the App Store and Google Play now, built on years of hands-on react native development.

Most of my work is mobile app development in React Native and Expo, plus the AI features and backend that make an app useful. I run engagements as a long-term partner, not a vendor you chase for updates - several have run 16 months to 4+ years. You get senior engineering ownership from the first call to store release: clear scope, milestone-based delivery, honest timelines, and a lead accountable for the result. As a mobile app developer, I make sure it gets done right, not just fast.

WHAT I BUILD
Full mobile app development in React Native and Expo, from idea to store release - a cross-platform iOS and Android app from one codebase, typically a launched MVP in 6-10 weeks. With hands-on react native development leading the build, I cover MVP work, App Store and Google Play submission, and everything between - whether you're hiring a react native mobile developer for a new build or a mobile app developer to fix an existing one.

AI integration is a core part of the work - chat, image/vision analysis, and conversational voice, using OpenAI and Anthropic Claude, already shipped in live AI mobile apps with clean API work so the AI feels native, not bolted on.

I also rescue and refactor React Native apps that broke under real users - performance, crashes, and stability work to get them store-ready - plus backend work in Node.js, NestJS, Python/FastAPI, PostgreSQL, MongoDB, Firebase, and Supabase (auth and RLS included) when your app needs more than screens.

WHO IT'S FOR

• Starting from scratch: idea to launched MVP in 6-10 weeks, backed by real react native development experience.
• Already have an app: mobile app development help with new features, performance, and stability - or a react native mobile developer to own the whole codebase.
• Want to add AI: a chat, vision, or voice feature shipped into your live app through scoped AI integration that ships fast and stays maintainable.

BEYOND MOBILE
Kultrix isn't only React Native. Depending on the project, I also work as a full stack web developer and full stack developer on React/Next.js and Node.js apps, plus React Laravel builds. The wider team includes a Flutter developer for cross-platform work when that fits better, and even C Developer work for lower-level pieces. If you need a React Native Mobile App Developer specifically, that stays the core of what I do - the rest is there so I can scope your project honestly instead of forcing the wrong stack.