Monetization
Payment & API integrations for mobile and web
I build reliable payment flows into your product: Stripe checkout and subscriptions, PayPal, StoreKit and Google Play billing, webhook handling, entitlements and custom third-party API integrations.
What you get
- Stripe Checkout, Billing and webhooks
- StoreKit and Google Play billing flows
- Paywall UI and entitlement handling
- Custom REST and webhook integrations
- Sandbox testing and production checklist
- Secure secret handling and error recovery
Tech & tools
- Stripe
- StoreKit
- PayPal
- IAP
- Webhooks
- Node.js
- Flutter
- Next.js
Frequently asked questions
Can you add Stripe to an existing app?
Yes. I implement Checkout or Billing, handle webhooks on a secure backend, and sync entitlements to your user accounts.
Do you support both web and mobile payments?
Yes. Web apps usually use Stripe or PayPal. Mobile apps use App Store and Google Play billing for digital goods, and I keep subscriptions in sync across platforms on the backend.
What about receipt validation?
I implement restore purchases and server-side verification that suits StoreKit 2, Google Play Billing or your payment provider.