Flutter/React Native Expert for App Completion

Mobile App Developer Needed to Take Over & Launch Existing App (Flutter / React Native)

I am looking for an experienced Flutter or React Native developer to take over an existing mobile app project and complete the final stage of development and deployment.

Project Overview

I already have a partially completed mobile application with most of the backend and infrastructure already in place:

Firebase backend fully configured
RevenueCat subscription system already set up
Google Play Console and Apple App Store accounts active
Domain, branding assets, screenshots, and legal pages completed
API keys and integrations already prepared

The app is close to launch and needs a reliable developer to complete or rebuild the frontend and handle final deployment.

Current Situation

The original developer is no longer available, and I now need someone to:

Take over or rebuild the mobile app frontend
Ensure full Firebase integration
Fix or confirm RevenueCat subscription/paywall functionality
Generate production builds for Android and iOS
Handle final deployment to both app stores
Responsibilities
Rebuild or take over existing app codebase (Flutter preferred)
Connect Firebase backend (auth, database, functions)
Integrate RevenueCat subscriptions correctly
Ensure full app functionality end-to-end
Prepare production builds (.aab for Android, .ipa for iOS)
Assist with Google Play + Apple App Store release if required
What Will Be Provided
Firebase project access
RevenueCat access
Google Play Console access
Apple App Store Connect access
API keys (including OpenAI if required)
App design assets, screenshots, and branding
Legal pages (Privacy Policy, Terms, Account Deletion)
FULL HANDOVER REQUIREMENT (CRITICAL)

At the end of the project, I require full ownership and delivery of all project assets, including:

Complete source code (Flutter / React Native project)
GitHub repository transfer to my account
Android build file (.aab)
iOS build file (.ipa or Xcode project)
Any backend configuration changes made
Basic documentation explaining setup and deployment

All work must be fully transferred with no external dependencies or developer-locked accounts controlling the project.

Ideal Candidate
Strong experience in Flutter or React Native
Experience with Firebase integration
Experience with RevenueCat or in-app subscriptions
Experience publishing apps to Google Play & Apple App Store
Comfortable taking over partially completed projects
Reliable communication and ability to deliver quickly
Timeline

Looking for a fast turnaround (1–3 weeks preferred) depending on complexity.

Important

This is a real, partially built product — not a concept.
I am looking for someone reliable who can take ownership, complete the build, and ensure a proper production launch.

To Apply, Please Include:
Relevant app launch experience
Examples of apps you’ve published
Estimated timeline for takeover and release
Confirmation you can provide full source code + repository handover