RS

Roman Sytnyk

Available to hire

I am a Mobile App Developer specializing in React Native for iOS and Android platforms.

About

I am a Mobile App Developer specializing in React Native for iOS and Android platforms. With a strong background in native Android and iOS development using Kotlin, Java, and Swift, I bring comprehensive expertise to creating and maintaining mobile applications. My experience spans building offline-first web3 crypto wallet apps, smart home apps, and other industry-specific applications, working collaboratively with global teams and deploying projects to both App Store and Google Play.

My passion lies in crafting seamless user experiences through modern technologies like React Native, Expo, and native modules, alongside continuous learning and contributing to open-source projects. I organize local developer meetups, participate in hackathons, and maintain a strong presence in the software engineering community, bringing innovative mobile solutions to the sectors I work in.

  • 5 years' experience
  • Joined August 2025

Languages

  • EnglishAdvanced
  • PolishIntermediate
  • UkrainianFluent
  • RussianFluent

Industry experience

  • Software & Internet
  • Financial Services
  • Real Estate & Construction
  • Professional Services
  • Gaming

More experts in Wrocław, Poland

Work experience· 5 roles

Senior React Native Developer (iOS/Android) + Native Modules Developer (Kotlin/Swift) · Lumen GlobalSep 2025 – Aug 2025

Developed and deployed an offline-first Web3 crypto wallet app using Expo (React Native) integrating Drizzle ORM (SQLite), Expo Router, Realm, Trust Wallet Core, Zustand, and Expo Application Services (EAS). Collaborated closely with a team of developers. Additionally developed native modules with Kotlin and Swift for Expo and React Native.

React Native Developer (iOS/Android) + Android Native Support · B3 Consulting PolandSep 2024 – Aug 2025 · 1 yr

Full redesign, maintenance, and implementation of new features for a Smart Home mobile app using React Native CLI with React Navigation, Redux, styled-components, and other libraries. Collaborated within a team environment. Provided support for native Android modules and maintained native Android screens for video surveillance features using Java and Kotlin.

React Native Developer (iOS/Android) · AgilieJul 2023 – Aug 2025 · 2 yrs 2 mos

Created React Native apps from scratch and maintained React Native projects using TypeScript, React Navigation, Redux Toolkit, MobX, i18next, Firebase, Sentry, and various OS features. Rewrote a native Android app from Kotlin to React Native. Built and deployed apps to the App Store and Google Play targeting house building, social media, and cryptocurrency industries. Performed React Native version upgrades.

Android Developer · AgilieApr 2021 – Aug 2025 · 4 yrs 5 mos
Android Developer (Part-time) · IAT Innovative Advertising Technologies GmbHSep 2019 – Aug 2025 · 6 yrs

Education

Master's Degree in Software Engineering · Dnipro University of Technology2015 – 2020

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