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Fiverr Pro
English
$
USD
I will fix your in app purchase and subscription verification on the backend
I fix AI built products that break in production, backend, auth, payments
I'm a founder, not an agency. I built and shipped a production product with AI assistance: a Next.js web app with live Stripe, an Express backend, and a mobile app in both stores with Apple IAP and Go...
About this Gig
Your app takes money. The question is whether your server knows it.
Most in app purchase code stops at the client. The SDK says the purchase went through, the app unlocks the feature, and nothing on your server ever checks with Apple or Google. That holds until someone patches the app, shares one account across devices, or refunds a subscription and keeps access.
I built the payment backend for a product live in both stores: purchases verified server side, entitlements stored in the database, renewals handled through store notifications.
WHAT I HANDLE
Receipt and token validation against App Store Server API and Google Play Developer API. Entitlements that survive reinstalls and device changes. Store notifications for renewal, cancellation, refund and grace period. Purchase restore. Sandbox testing.
WHAT I DO NOT DO
I do not build or submit iOS releases and I do not write client code. I work on your backend, your store configuration and the API your app calls. Android I can test on a real device. For iOS your developer runs the build.
Send me your stack and how purchases work now, and I will tell you what is missing before you order.
Expertise:
Firebase
•
Analytics
Platform:
Cross-platforms
App type:
Hybrid
Programming language:
Dart
•
Java
•
JavaScript
•
Kotlin
•
TypeScript
Frameworks:
Flutter
•
Node.js
Tools:
Android Studio
•
Supabase
FAQ
Do you work with RevenueCat or Adapty?
Yes. If you already use one, I verify entitlements through their API and webhooks instead of calling the stores directly. If you do not, I will tell you whether adding one is worth it in your case.
My app is Flutter or React Native. Does that matter?
Not much. The client SDK differs, the server side logic does not. I have shipped this with Flutter, and the backend work is the same either way.
Can you test iOS purchases?
I test the server side of iOS purchases in sandbox using data your developer sends me. I cannot run the app on a device, since I do not have a Mac or an iPhone. Android I test end to end myself.
