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

Scope

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 10–20 hours per week, with a higher share during the handover in December. We’ll align on capacity together on a regular basis.

Mission

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.

Profile

• 3–5 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.