Stripe and PayPal API Integration for Subscription-Based SaaS Platform

Category: Web Development

Budget: 1675–1675 USDC

We are seeking a seasoned backend developer to integrate a robust payment gateway system into our existing React/Node.js SaaS platform. The project requires the implementation of both Stripe and PayPal to handle recurring monthly subscriptions, one-time trial fees, and automated invoicing. Key deliverables include secure credit card processing, webhook configuration for real-time payment status updates, and a customer billing portal for plan upgrades or cancellations. You must ensure PCI compliance and implement error handling for failed transactions. The ideal candidate will have extensive experience with Node.js, Express, and official payment SDKs. We expect the core integration and sandbox testing to be completed within 14 days, followed by a 3-day production monitoring phase to ensure everything scales correctly under load.

Skills required

• Node.js
• Stripe API
• PayPal Integration
• API Development
• React

Milestones are funded into USDC escrow on Polygon before work begins.