Flutter/React Native Mobile App

I need a cross-platform mobile application built for both iOS and Android using either Flutter or React Native. The scope is intentionally lean for a first release, yet it must be production-ready and store-approved.

Core functionality
The app’s main job is secure user authentication through a classic email-and-password flow. Once signed in, users must be able to complete purchases inside the app via a payment gateway; I’m open to Stripe, Braintree, or any mainstream provider you recommend, as long as it passes Apple and Google review without friction.

What I’ll supply
• Figma screen designs and a short functional spec
• App Store & Play Store account access for submission
• Test data for the payment sandbox

What I expect you to own end-to-end
• Implementation of all screens and navigation in Flutter or React Native
• Firebase (or equivalent) setup for auth, including password reset and session handling
• Integration, sandbox testing, and live configuration of the chosen payment gateway
• Thorough QA, bug fixing, and performance tuning on recent iOS and Android versions
• Preparation of metadata, screenshots, and compliance items, followed by submission until both stores approve the app

Deliverables
1. Clean, well-documented source code in a private Git repository
2. Release candidates (IPA and AAB) ready for TestFlight and Play Console internal testing
3. Final builds live in the App Store and Google Play

Acceptance criteria
• New users can sign up, log in, log out, and reset passwords without errors
• A complete purchase can be made with test and live cards in the payment gateway
• The app passes Apple’s and Google’s latest review guidelines

Start your proposal with the word “AI” so I know you read everything, and please include links to a few published apps where you handled both development and store submission.