You will get a payment gateway integration for your Node.js backend
Project details
You will get a payment gateway integrated into your Node.js
backend, production-ready, secure, and fully automated.
I have built and deployed payment systems handling real
transactions for 150+ active users in production. I handle
webhook handling, secure signature generation, payout automation,
and switch logic between multiple providers.
I work with any REST-based payment API. You bring your provider,
I handle the integration.
I support both webhook-based and polling-based payment flows
depending on your provider's capabilities.
Stack: Node.js, TypeScript, Express, Prisma, PostgreSQL.
backend, production-ready, secure, and fully automated.
I have built and deployed payment systems handling real
transactions for 150+ active users in production. I handle
webhook handling, secure signature generation, payout automation,
and switch logic between multiple providers.
I work with any REST-based payment API. You bring your provider,
I handle the integration.
I support both webhook-based and polling-based payment flows
depending on your provider's capabilities.
Stack: Node.js, TypeScript, Express, Prisma, PostgreSQL.
Programming Languages
JavaScript, TypeScriptWhat's included
| Service Tiers |
Starter
$150
|
Standard
$200
|
Advanced
$550
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 18 days |
Number of Revisions | 2 | 3 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$50 - $120
Additional Revision
+$30Frequently asked questions
About Nonfon
Node.js & TypeScript Backend Developer | REST APIs | SaaS | PostgreSQL
Accra, Ghana - 8:46 am local time
but real products used by real people, every day.
I'm Sonagnon Yaji NONFON, a backend developer based in Accra, Ghana. I've delivered
3 production-ready products as sole developer:
→ Mp Recharge: mobile-first deposit and withdrawal platform.
Role-based access, payment gateway integration, React Native APK.
100+ active users. 100% automated, client went from 3hrs/day
of manual work to zero.
→ EyadigitalBilling: complete billing SaaS for freelancers.
Locked workflow (Quote → Contract → Invoice → Receipt),
PDF generation, JWT auth, Swagger docs. Used daily in production.
→ Stockwise: order & inventory tool for WhatsApp sellers in
West Africa. Google OAuth, 3-layer stock logic, PDF/Excel export,
Sentry monitoring.
My stack:
Node.js · TypeScript · Express.js · PostgreSQL · MongoDB · Prisma ·
Next.js · React Native · Tailwind CSS · Docker
What you can expect:
✔ Production-ready code, DDD architecture, clean and documented
✔ Full-cycle delivery: from 0 to deployed product
✔ Clear communication, on-time delivery, no surprises
✔ Swagger docs, monitoring, security baked in by default
"He built the entire Mp Recharge platform from scratch, robust,
fully functional, on time. Yaji is the person you need." — Elias S.
If you need a backend built right the first time, let's talk.
Steps for completing your project
After purchasing the project, send requirements so Nonfon can start the project.
Delivery time starts when Nonfon receives requirements from you.
Nonfon works on your project following the steps below.
Revisions may occur after the delivery date.
Provider review & setup
I review the provider documentation and sandbox credentials within 24 hours.
Integration & testing
I implement webhooks, signature logic, and payout automation. Full sandbox testing before production.