Razorpay Payment Gateway & UPI Integration Services
I implement seamless, high-converting Razorpay checkout workflows for Indian startups, e-commerce stores, and SaaS businesses. From instant UPI intent flows to automated HMAC-SHA256 webhook verification and auto-refund handling, your domestic revenue collection operates flawlessly.
Why Naive Integrations Fail in Production
In India, over 75% of digital consumer payments occur over UPI. If your checkout drops user intent, mishandles UPI timeout callbacks, or fails to verify webhook signatures securely, payments get stuck in limbo and customers churn.
What I Deliver in This Integration
Security, Webhooks & Fault Tolerance
Cryptographic HMAC Verification
Every payment callback verifies the combination of `order_id|payment_id` against the secret key using crypto HMAC-SHA256 before marking orders as paid.
Payment Reconciliation Engine
A fallback scheduled reconciler queries the Razorpay API for pending transactions, capturing payments that succeeded even if customer closed the browser prematurely.
RBI Compliance & Tokenization
Full adherence to Reserve Bank of India (RBI) card tokenization directives and two-factor authentication requirements.
Supported Production Workflows
Server-Validated Checkout Flow
Tamper-proof order creation and payment capture sequence.
Real-World Outcomes
D2C online store needing instant UPI checkout with automatic order slip generation.
✓ Outcome: Reduced checkout drop-off by 24% with sub-3-second UPI completion and automated order dispatch.
Course platform requiring installment payments and automated GST invoicing.
✓ Outcome: 100% automated course unlocking with immediate SMS and WhatsApp receipt delivery.
Frequently Asked Questions
Can you integrate Razorpay into both Next.js web and Flutter mobile apps?
Yes. I integrate Razorpay SDK across web (Next.js/React) and mobile (Flutter `razorpay_flutter`), backed by a unified Node.js API service for server order creation and webhook processing.
How do you prevent users from tampering with payment amounts?
The payment amount is never sent from the frontend. The server calculates cart prices directly from authoritative database records and registers the order with Razorpay, ensuring the customer can only pay the exact verified amount.
Plan Your Razorpay & Indian UPI Integration
Let me know which application you are building or upgrading and the integration requirements. I will review the architecture and outline an idempotent, secure integration plan.