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$
USD
I will integrate stripe, paypal, or any payment gateway
Afaq U
About this gig
Payment integration is the highest-stakes code in your application. One bug means lost revenue, failed transactions, or worse, a security breach. I've built payment systems processing $10M+ per month with zero downtime.
Gateways I've worked with:
Stripe (one-time, subscriptions, Connect, refunds, disputes)
PayPal (standard, express checkout, IPN webhooks)
USAePay (Card + ACH bank transfers)
Payroc and N-Genius
Any gateway with a documented API
What's included in every integration:
Secure tokenization, no raw card data ever touches your server
Webhook listeners for real-time payment event handling
Subscription & recurring billing management
Automated invoice generation & email receipts
Refund and cancellation flows
Full error handling and logging
React checkout UI (if needed)
I work with Laravel, CodeIgniter, and plain PHP backends.
Don't let an inexperienced developer touch your payment system. Message me with your gateway and requirements, and I'll have a plan ready fast.
Get to know Afaq U
Afaq U
Senior Full Stack Engineer
- FromPakistan
- Member sinceMar 2020
- Last delivery5 years
Languages
Punjabi, English, Urdu
Senior full-stack engineer, 6+ years. I've rebuilt patient portals for 90K+ users, architected billing systems processing $10M+/month, and slashed DB load times from 2 mins to under 2 seconds.
Stack: React · Laravel · MySQL · AWS · GraphQL · WebSockets
I'm not a one-and-done contractor — I'm a long-term technical partner for SaaS and HealthTech teams that need things built right.
Let's talk.
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FAQ
Is the integration PCI compliant?
Yes. I use gateway tokenization (Stripe.js, PayPal SDK) so raw card data never hits your server. You stay at PCI DSS SAQ-A — the safest, simplest compliance tier.
Can you migrate between payment gateways?
Yes — including active subscriptions. I handle token migration, parallel running periods, and ensure zero billing disruption for existing customers during the switch.
Do you handle subscription and recurring billing?
Yes. Plans, trials, upgrades, proration, failed payment retries, dunning emails, and cancellations. I've built recurring billing processing $10M+/month with automated invoicing.
What if a webhook fails or payment errors out?
I build idempotent webhook listeners with retry queues and failure logging. Every event is validated and processed exactly once. Failed payments trigger automated retries and customer notifications.
Can you build the checkout UI too?
Yes — full end-to-end: React/Blade checkout form, card validation, backend charge, confirmation screen, and receipt email. Complete flow, not just backend code.
Do you support ACH / bank transfers?
Yes — production experience with USAePay ACH. I handle bank verification, return codes, settlement timing, and status tracking. Ideal for B2B platforms with high transaction values.
Can you integrate multiple gateways in one system?
Yes. I build a gateway abstraction layer so your app doesn't care which gateway processes each transaction. Ideal for multi-region platforms or redundancy setups.
Will you test before going live?
Always. Full sandbox testing — successful payments, declines, refunds, webhooks, and edge cases. I provide a checklist so you can verify everything yourself before launch.
