You will get a multi-gateway payment system with fraud detection


Project details
I've integrated PayPal, NowPayments, Coinbase Commerce, CoinGate, and Checkout.com into a single production platform — complete with wallet system, deposit/withdrawal flows, webhook handling, and MaxMind GeoIP fraud detection. This is live, running real transactions on ChessHustleHouse.com.
I'll integrate your chosen payment processors with proper webhook verification, idempotency handling, sandbox testing, error recovery, and fraud prevention built in from day one. No half-measures — you get production-grade payment infrastructure.
Stack: TypeScript, Node.js, PayPal SDK, NowPayments, Coinbase Commerce, MaxMind, PostgreSQL/Supabase.
I'll integrate your chosen payment processors with proper webhook verification, idempotency handling, sandbox testing, error recovery, and fraud prevention built in from day one. No half-measures — you get production-grade payment infrastructure.
Stack: TypeScript, Node.js, PayPal SDK, NowPayments, Coinbase Commerce, MaxMind, PostgreSQL/Supabase.
What's included
| Service Tiers |
Starter
$400
|
Standard
$800
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 21 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Optional add-ons
You can add these on the next page.
Additional Revision
+$75
Crypto payment integration
(+ 5 Days)
+$300Frequently asked questions
About Adam
Full Stack Software Engineer | Real-Time Multiplayer Games
Ottawa, Canada - 3:14 am local time
I specialize in TypeScript, React, Node.js, Firebase, and WebSocket development, and I’ve led the creation of ChessHustleHouse — a gamified online chess platform that integrates real-time matchmaking, social interaction, and 3D environments.
Whether it’s developing scalable back-end systems, optimizing front-end performance, or integrating AI-driven features, I’m driven by the challenge of bringing bold, user-centered ideas to life.
Steps for completing your project
After purchasing the project, send requirements so Adam can start the project.
Delivery time starts when Adam receives requirements from you.
Adam works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements review
Processors needed, wallet vs one-time, currency requirements
Sandbox integration and webhook setup for each processor