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$
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I will integrate payment gateway and checkout system in your flutter app and website
Muhammad Wakeel
About this gig
Need a secure payment gateway
integrated into your Flutter
app? I provide complete
payment gateway integration
for startups, ecommerce apps,
and mobile businesses.
As a full-stack Flutter and
backend developer, I handle
the checkout UI, payment API,
database, and testing myself -
so you don't need multiple
developers.
WHAT'S INCLUDED:
- Stripe, PayPal, or regional
payment gateway setup
- Secure Flutter checkout screens
- Backend verification and
webhook handling
- Success, failed, and pending
payment flows
- Order and transaction
synchronization
- Subscriptions and recurring
billing
- Refund handling
- Firebase, Supabase, or SQL
backend integration
- Sandbox and production testing
WHY CHOOSE ME:
- Complete Flutter and backend
expertise - one developer,
full solution
- Clean, secure, scalable code
- Fast, clear communication
I only integrate official
payment APIs into apps you own.
No recurring fee from me
unless ongoing maintenance is
requested.
Message me with your app and
gateway details before ordering
so I can confirm the right
payment gateway package for you.
Get to know Muhammad Wakeel
Muhammad Wakeel
Full Stack Flutter App Developer Backend, Payment Gateway, WhatsApp Cloud API
- FromPakistan
- Member sinceJul 2026
- Avg. response time1 hour
Languages
Afrikaans, Dutch, Arabic, Danish, Japanese, Korean, Icelandic, Chinese, English, Spanish, German, French, Portuguese, Italian
Full-Stack Flutter App Developer | Backend, Maps, Payment Gateway Integration & In-App Purchases | WhatsApp Cloud API, OTP & AI Automation | Play Store Deployment | AI-Generated Video Ads, SEO, Google/Meta/TikTok Ads & Business Growth
I build complete mobile apps that
go live & generate real revenue.
✅ Flutter (Android & iOS)
✅ Firebase, Supabase & Node.js
✅ WhatsApp Cloud API & OTP/2FA
✅ Google Maps & Live Tracking
✅ Payment Gateway & In-App Purchases
✅ Play Store Deployment (DUNS)
✅ Meta, TikTok & YouTube Ads
✅ AI Video Ads & SEO
Let's build something profitable!
My Portfolio
FAQ
Which payment gateway do you support?
I integrate Stripe, PayPal, and regional payment gateways into Flutter apps, depending on your business location.
Can you fix my existing payment gateway issues?
Yes, I fix broken payment flows, failed transactions, and webhook errors in existing Flutter apps.
Do I need a merchant account already?
You'll need your own merchant or gateway account. I handle the technical integration into your Flutter app.
Can you handle both Flutter and backend integration?
Yes. I can handle the Flutter checkout UI, payment API, backend verification, webhooks, database updates, testing, and deployment as one full-stack developer.
What information do you need to start?
I need your Flutter app details, backend technology, selected payment gateway, required payment flow, merchant account status, and access to the relevant source code and test environment.
Can you integrate subscriptions and recurring payments?
Yes, where supported by the selected gateway and permitted for your app use case. Subscription scope, billing cycle, cancellation, and renewal handling should be confirmed before ordering.
Can you add backend payment verification and webhooks?
Yes. I can implement server-side payment verification, webhook handling, transaction-status updates, and database synchronization according to the selected package.
Can you fix an existing payment integration?
Yes. I can diagnose and fix checkout errors, failed callbacks, webhook issues, incorrect transaction status, sandbox problems, and supported production integration errors.
Are payment gateway fees included in the package?
No. Gateway transaction fees, merchant-account charges, hosting, domains, subscriptions, and other third-party costs are paid separately by the client.
