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

Necture; Wien; On-site; EUR 83,000 - 124,000; Part time

Job summary

Necture GmbH in Vienna is seeking a freelance mobile developer to own and evolve the Necture mobile app (iOS & Android) built with React Native and Expo.

The role targets 10–20 hours per week with a December handover, spanning approx. 3 months. You’ll own feature work, handle releases to App Store and Google Play, and collaborate in an agile squad with backend and product teams.

Qualifications

• 3–5 years of professional mobile development experience.
• At least 2 years in React Native.
• Hands-on with Expo/EAS Build, iOS/Android releases.
• Experience with automated testing and monitoring.

Responsibilities

• Take ownership of the Necture mobile app (iOS & Android).
• Build and maintain features in React Native with TypeScript, from implementation to store releases.
• Integrate backend services via REST, Firebase, and Supabase, including offline handling.
• Collaborate with backend engineers and product in an agile squad, including code reviews.

Skills

React Native

TypeScript

Expo

EAS Build

App Store Connect

Google Play Console

Jest

Sentry

Firebase

Supabase

Swift

Kotlin

CocoaPods

Gradle

Tools

Firebase

Supabase

App Store Connect

Google Play Console

Swift

Kotlin

CocoaPods

Gradle

Jest

Sentry

Job description

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.