Solucrew · FinTech & Payment Systems
Multi-Channel Payment Gateway Architecture & Integration
Solucrew's role Payment Architecture & Backend Security Engineer
Delivered by Solucrew's backend and systems engineer
Our contribution
A secure payment infrastructure supporting multiple gateways, card tokenization, recurring billing and reliable transaction processing.
Designed and integrated secure payment engines for web applications, e-commerce platforms and SaaS products. The architecture supported one-time payments, card tokenization and recurring subscriptions across Stripe, PayPal and regional payment providers. Implemented secure webhook processing with HMAC verification, OAuth-based integrations, subscription and dunning workflows, and idempotent transaction handling to prevent duplicate charges during retries, refreshes and network failures.
Technology & capabilities
- PHP
- Node.js
- Stripe API
- PayPal REST SDK
- Checkout.com
- Razorpay
- Authorize.Net
- Webhooks
- HMAC Signatures
- MySQL
- SSL/TLS
Have a project in mind?
Tell us about the product and the problem — we'll help figure out what needs to be built, and how.