Contact person: Business Client

Phone:Show

Email:Show

Location: Noida, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I’m enhancing an existing Flutter application and want to round out three core areas at once: secure Stripe payments, robust Firebase back-end services, and on-device TensorFlow Lite inference.

Stripe
The app must handle one-time charges, recurring plan subscriptions, and full or partial refunds. All flows need to respect Strong Customer Authentication where applicable, surface meaningful error messages in the UI, and write a concise payment record to Firestore the moment the webhook confirms success. I already hold valid Stripe keys; I simply need you to wire everything together in Flutter (using `stripe_payment` or the latest official package) and supply the minimal Cloud Function that listens for events and updates Firestore.

Firebase
I’m using Firestore as the primary data store and Firebase Authentication (email/password plus social providers already enabled). Your task is to slot your new payment records into Firestore without breaking existing security rules, and where auth is required—for instance, when attaching a payment method—make sure the user’s session is correctly honored. Please keep the Firestore structure readable and index-friendly.

TensorFlow Lite
A pre-trained TFLite model (approx. 30 MB) is ready. I need you to load it in the app, run inferences on provided images, and return the top-N predictions to the UI. No training is needed—just efficient, on-device execution with proper error handling and a quick performance benchmark on both Android and iOS release builds.

Deliverables
• Updated Flutter project source with Stripe (one-time, subscriptions, refunds) fully functional
• A single Cloud Function (TypeScript or JavaScript) for webhook to Firestore sync
• Integration of Firestore writes and reads that respect existing rules
• Authentication checks where required
• TensorFlow Lite inference module with a brief README on usage
• Short screen-recording or screenshots proving each feature works on a real device

Acceptance will be based on cloning the repo, running `flutter pub get`, setting my own API keys, and seeing all flows operate exactly as described." (client-provided description)