Browse categories
Explore
Fiverr Pro
English
$
USD
I will integrate stripe or lemon squeezy checkout for your saas
Muhammad Wakeel
About this gig
Struggling with payment gateway rejections or complex checkout errors?
As a full-stack Flutter developer, I build secure, seamless checkout systems. Whether you need standard Stripe/PayPal or a verified Lemon Squeezy setup (ideal for global digital products & SaaS without strict region bans), I handle everything from UI to backend webhooks myself.
WHAT'S INCLUDED:
Lemon Squeezy Setup: Need an account? I can set it up, get it ready, and transfer full access to your email!
Stripe, PayPal, or Lemon Squeezy integration.
Secure Flutter checkout screens & cart management.
Backend verification, webhooks, and database sync (Firebase/Supabase/SQL).
Subscriptions, recurring billing & refund flows.
Complete sandbox & production testing.
WHY CHOOSE ME?
Complete Flutter & backend expertiseone developer, full solution.
Clean, secure, scalable code.
No recurring fees from me.
I only integrate official APIs into apps you own. Message me with your app details before ordering so we can get started today!
Get to know Muhammad Wakeel
Muhammad Wakeel
Full Stack Web and Mobile Architect NextJS, Flutter, Golang, GCP, Whatsapp API
- FromPakistan
- Member sinceJul 2026
- Avg. response time2 hours
Languages
Afrikaans, Dutch, Arabic, Danish, Japanese, Korean, Icelandic, Chinese, English, Spanish, German, French, Portuguese, Italian
I build complete mobile apps and
web platforms that go live and
generate real revenue.
✅ Flutter (Android & iOS)
✅ Next.js & Golang Backend
✅ Firebase, Supabase & PostgreSQL
✅ WhatsApp Cloud API & OTP/2FA
✅ Google Maps & Live Tracking
✅ Payment Gateway & In-App Purchases
✅ GCP & Cloudflare Hosting
✅ 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.
