Senior React Native Engineer (App Owner)

MILES; Berlin; Remote; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Work from home available

MILES goodies

Open collaboration with colleagues

Job summary

MILES in Berlin, Germany, seeks a senior mobile engineer to own the app's architecture on iOS and Android, delivering robust performance and platform-native modules when needed.

You'll define API contracts with backend, integrate third-party SDKs, maintain automated tests, and apply AI tooling in development and deployment. Fluent English and eligibility to work in Germany are required.

Qualifications

• 5+ years of React Native in production.
• Shipped apps to App Store and Google Play.
• Fluent in English; eligible to work in Germany.

Responsibilities

• Own the app's architecture, code quality, performance and stability on iOS and Android.
• Build and maintain native modules in Swift or Kotlin where React Native is not enough.
• Own native build, release and store distribution for iOS and Android.
• Agree API contracts with backend engineers and handle offline, retry and error states.
• Integrate and maintain third-party SDKs for payments, maps, analytics and messaging.
• Build and maintain automated test coverage and run it in CI.
• Keep the codebase's AI tooling in version control and review it like code.
• Effectively deploy and use AI agents.

Skills

React Native

TypeScript

JavaScript

Swift

Kotlin

REST API

CI/CD

Testing

Tools

Xcode

Android Studio

GitLab CI

GitHub Actions

Fastlane

Detox

Jest

Job description

• Own the app's architecture, code quality, performance and stability on iOS and Android
• Build and maintain native modules in Swift or Kotlin where React Native is not enough
• Own native build, release and store distribution for iOS and Android
• Agree API contracts with backend engineers and handle offline, retry and error states
• Integrate and maintain third-party SDKs for payments, maps, analytics and messaging
• Build and maintain automated test coverage and run it in CI
• Keep the codebase's AI tooling in version control and review it like code
• Effectively deploy and use AI agents

Benefits

• Work from home available
• MILES goodies
• You can quickly take on a lot of responsibility, contribute your ideas and enjoy the openness of all colleagues

• Automated testing with Jest and Detox or Maestro, run in CI such as GitLab CI or GitHub Actions
• 5+ years of React Native in production, shipped to both the App Store and Google Play
• REST API integration with deliberate handling of async, offline and error states
• Solid native knowledge: Swift or Objective-C with Xcode, Kotlin or Java with Android, Studio and Gradle
• Fluent in English, and eligible to work in Germany
• Strong TypeScript and JavaScript, and experience with modern state management
• Store releases with fastlane: signing, pre-release test tracks and staged rollouts
• Don't tick every box?
• Your drive to learn and grow matters a lot to us
• Accessibility and localisation for a multi-language audience
• Map-heavy apps: location permissions, push notifications and deep linking
• Daily use of AI coding agents, reviewing their output like any pull request
• Comfortable reading backend code in a typed language and SQL
• A valid driving licence (EU category B or equivalent).
• Testing the product includes trip on the road
• Payment SDK integration in a consumer app
• Experience in mobility, logistics or another operations-heavy consumer product