Freelance React Native Developer (Mid-Level) – Parental Leave Cover

Freelance engagement starting in December 2026 (incl. handover period) for approx. 3 months based in Vienna.

Workload is flexible and needs-based expected at around 1020 hours per week with a higher share during the handover in December. Well align on capacity together on a regular basis.

Take ownership of the Necture mobile app (iOS & Android) built in React Native with Expo and its integration with our backend services.

• Build and maintain features in React Native with TypeScript from implementation to App Store and Google Play release.

• Integrate backend services via REST Firebase (Auth Realtime Database Cloud Messaging) and Supabase Realtime including authentication state management and offline/error handling.

• Collaborate closely with backend engineers and product in an agile squad including code reviews.

• 35 years of professional mobile development experience with at least 2 years in React Native.

• Mobile release ownership on Expo / EAS: EAS Build profiles (dev client internal QA production) EAS Submit and signing credentials for iOS and Android.

• Hands-on with App Store Connect and Google Play Console: TestFlight and internal testing tracks store review (incl. demo accounts) versioning staged rollouts and forced updates.

• Familiar with Expo config plugins including writing custom config plugins and native modules (Expo Modules API) where needed with working knowledge of Swift and Kotlin to debug platform-specific build issues (CocoaPods Gradle).

• Experience with automated testing (Jest) and release monitoring via Sentry (source maps release health).

• Able to get up to speed quickly in an existing codebase and work independently after a short handover.

• Fluent English; German is a plus.

• Plus: Experience with Expo SDK / React Native upgrades and the New Architecture.

• Plus: Interest in AI and agentic products.