What "Payment Gateway Integration" Actually Means Here
A checkout button that redirects to a payment page is the easy 20% of the job. The other 80% is what happens after the customer clicks pay: webhook handling, signature verification, order status reconciliation, refunds, retry logic for failed transactions, and making sure your database never disagrees with what the gateway actually settled. Urgent IT Solution builds this layer for Indian and international businesses that need to accept payments through Razorpay, PayU, CCAvenue, Cashfree, Instamojo, Stripe, PayPal, or bank-specific gateways like HDFC, ICICI or Axis payment aggregators - either as a single gateway or a multi-gateway setup with automatic failover.
This is not a one-size skeleton. A subscription SaaS product needs recurring billing (mandates, tokenization, auto-debit via UPI AutoPay or NACH), while a D2C storefront needs COD reconciliation, partial refunds, and settlement reports that match with Shopify or WooCommerce orders. We scope the actual transaction lifecycle before writing a line of integration code.
Which Gateway (or Combination) Fits Your Business
Domestic vs cross-border transactions
If you're selling only within India, Razorpay, PayU or Cashfree cover UPI, cards, netbanking and wallets with straightforward KYC. If you also need to accept international cards or multi-currency payments, you're looking at Stripe, PayPal, or a Razorpay/PayU account with international payment capability enabled - which comes with extra RBI compliance documentation and settlement timelines you need to plan for upfront.
Aggregator vs bank-direct integration
Aggregators (Razorpay, PayU, Cashfree) get you live in days with a shared merchant setup. A bank-direct or dedicated merchant ID integration (via a payment gateway provider tied to your own merchant account) takes longer to onboard but usually gives lower transaction fees at higher volumes and more control over settlement cycles. We help you work out the breakeven volume where switching makes financial sense.
Recurring billing and subscriptions
For SaaS or membership products, we implement e-mandates, UPI AutoPay, or card tokenization (network tokenization compliant with RBI's card-on-file tokenization mandate) so you're not storing raw card numbers and not asking users to re-enter card details every billing cycle.
The Technical Integration Work
Server-side order and payment verification
We never rely on client-side "payment success" callbacks alone. Every integration includes server-to-server verification - checking the payment signature (HMAC/SHA256 depending on the gateway), confirming the amount and order ID match what was originally created, and only then marking an order as paid. This is the single most common gap we find when auditing existing integrations: businesses trusting a frontend redirect instead of verifying server-side.
Webhooks and idempotency
Gateways send webhook events for payment captured, failed, refunded, and disputed. We build idempotent webhook handlers so a duplicate webhook (which gateways do send, by design, for reliability) doesn't double-credit an order or trigger two shipment notifications. Each webhook is logged with its raw payload for audit and dispute resolution later.
Reconciliation and settlement matching
At the end of each settlement cycle, the amount that lands in your bank account rarely matches the gross order value exactly - gateway fees, GST on fees, and refunds all need to be accounted for. We set up reconciliation reports (manual export matching or automated via gateway settlement APIs) so your finance team isn't manually cross-checking bank statements against order records every month.
Retry logic and failure handling
Failed and pending transactions need distinct handling. A "pending" UPI payment that later succeeds shouldn't be treated the same as a hard decline. We build retry prompts, timeout handling for pending states, and abandoned-cart-style follow-ups for failed payments where it's relevant to the business.
Security and Compliance Scope
PCI-DSS compliance obligations depend on how payment data flows through your system. Using a hosted checkout or SDK-based redirect (Razorpay Checkout, Stripe Elements, PayPal's hosted buttons) keeps your servers out of card-data scope entirely, which is the approach we recommend for most clients since it drastically reduces audit and compliance burden. If a business specifically needs a custom on-page card form for UX reasons, we scope that as a separate, heavier compliance conversation involving SAQ A-EP or higher, and we're upfront that this adds cost and ongoing audit obligations most businesses don't need to take on.
We also implement transaction-level fraud checks where the gateway supports it (velocity checks, AVS/CVV matching, risk scoring), and enforce HTTPS, secret-key rotation, and server-side key storage (never in frontend JS or mobile app binaries) as baseline practice.
Platform-Specific Implementation
Websites and web apps
Custom-coded sites (Node.js, PHP, Django, Laravel) get direct SDK/API integration. WordPress/WooCommerce sites use a combination of official plugins and custom hooks where the default plugin logic doesn't match the business's refund or subscription rules.
Mobile apps
Native Android/iOS and React Native/Flutter apps use the gateway's mobile SDK for the actual payment sheet, with our backend handling order creation and verification - keeping API secrets off the device entirely.
Custom software and internal platforms
For ERP, HRMS payroll disbursement, or B2B invoicing software, integration often means payout APIs (vendor/employee payments) rather than just collection - a different API surface (Razorpay Payouts, Cashfree Payouts) with its own compliance and beneficiary verification steps.
What You Get at the End
- Working integration with the chosen gateway(s), tested across success, failure, pending and refund flows
- Server-side verification and webhook handling code, documented for your team or ours to maintain
- Reconciliation setup matching gateway settlements to your order/invoice records
- Test-mode to production go-live checklist, including KYC/merchant activation coordination with the gateway
- Post-launch support for gateway-side changes (API version deprecations, new mandate rules, fee structure updates) that would otherwise silently break checkout
When to Fix an Existing Integration Instead of Rebuilding
A large part of this work is auditing integrations someone else built - usually a rushed plugin setup or a freelancer's client-side-only implementation. Common issues we find: no webhook handler at all (relying solely on redirect callbacks that fail silently if a user closes the browser tab), refunds processed manually outside the system with no record sync, and API keys hardcoded in frontend code. In most of these cases, we patch the verification and reconciliation layer rather than ripping out the whole checkout, which is faster and cheaper than a full rebuild.