Contact person: Business Client

Phone:Show

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Location: Hyderabad, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I have a fully designed e-commerce front-end in React and an existing Node.js API that powers the shopping-cart flow. What’s missing is a clean, production-ready PhonePe payment gateway integration that can handle the entire checkout cycle: order creation, secure payment hand-off, callback verification, error handling, and success redirects.

You’ll be working with my current codebase (React 18 + Redux on the client, Express on the server). All UI screens and routes are already in place; the cart totals, order IDs, and user sessions are ready to be passed to the gateway. Your task is to slot PhonePe in seamlessly, wire up the necessary server-side signature generation/validation, and expose any state updates to the React store so the user sees real-time payment status.

Deliverables
• End-to-end PhonePe integration in both environments (sandbox and live)
• Secure Node.js helpers for checksum/signature generation & verification
• Updated React checkout component that triggers the gateway, shows loader states, and handles success/failure callbacks gracefully
• Brief setup notes and `.env` examples so I can reproduce the flow locally and on staging

Acceptance criteria
• A test transaction processes successfully in sandbox and reflects the correct order status in the UI and database.
• Failed or abandoned payments route back to the cart with a clear error message and no order duplication.
• Code is lint-clean, commented where the gateway logic lives, and committed via one pull request so I can review the diff easily.

If you’ve already integrated PhonePe (or similar wallets) in a React/Node stack and can jump straight into implementation, let’s get started." (client-provided description)