Senior React Native Engineer

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Senior React Native Engineer building and scaling a mobile app for a fast-growing adtech startup. Responsible for developing high-quality applications and optimizing performance metrics.

Posted 4/13/2026full-timeRemote • 🇺🇦 UkraineSeniorWebsite

Tech Stack

Tools & technologies

AndroidGradleiOSJavaScriptJestKotlinNext.jsReactReact NativeReduxSwiftTypeScript

About the role

Key responsibilities & impact

Develop and maintain high-quality cross-platform applications using React Native and TypeScript
Build reusable UI components and highly performant lists (utilizing tools like FlashList or FlatList) that strictly adhere to design specifications
Integrate mobile apps with backend services via RESTful APIs and WebSockets to ensure real-time data synchronization
Debug platform-specific issues using Xcode and Android Studio, and write or modify native modules (Swift/Kotlin) when standard libraries are insufficient
Champion code quality by writing clean, testable TypeScript code and actively participating in peer code reviews to ensure standards for readability and maintainability are met
Contribute to the long-term health of the codebase by identifying and fixing technical debt and improving overall test coverage
Actively contribute to architectural discussions, offering well-reasoned input on state management (e.g., Redux Toolkit, Zustand) and navigation patterns to improve scalability
Monitor production stability using tools like Sentry or Crashlytics, proactively identifying and fixing crashes or errors
Optimize app performance by focusing on specific metrics such as frame rates, memory usage, app size, and battery consumption
Own and evolve CI/CD pipelines to ensure smooth and reliable releases to the App Store and Google Play
Collaborate effectively with non-technical stakeholders to explain technical constraints and propose viable solutions

Requirements

What you’ll need

5+ years of professional software engineering experience, with at least 4 years strictly focused on React Native development
Strong proficiency in TypeScript and the React Native ecosystem (CLI, Hermes, debugging tools)
Deep understanding of iOS and Android build systems (Gradle, Pods, signing/provisioning). You must have the ability to both read and write native code (Swift/Kotlin) to debug platform-specific issues
Deep expertise in modern React patterns (Functional Components, Hooks) and state management libraries (Redux Toolkit, Zustand, or TanStack Query), with a track record of making and defending
Proven experience writing unit and integration tests using Jest and hands-on experience with End-to-End (E2E) testing using tools like Maestro or Detox
Ability to explain technical concepts clearly to diverse teams
Experience with Next.js is a strong advantage. Candidates without prior Next.js experience are welcome, provided they demonstrate a solid React foundation and a clear willingness to learn
English: Upper-Intermediate (B2) or higher. You need to be able to communicate clearly in English (written and spoken) to work effectively in an international team and participate in architectural discussions

Benefits

Comp & perks

15 days of paid vacation days
5 days of paid days off
5 days of paid sick leave
Maternity/Paternity leave
National holidays based on the country of your stay

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

React NativeTypeScriptRESTful APIsWebSocketsSwiftKotlinRedux ToolkitZustandJestNext.js

Soft Skills

collaborationcommunicationproblem-solvingcode qualitytechnical debt managementarchitectural discussionsexplanation of technical concepts