E-Commerce Development

Payment Gateway Integration

Seamless payment processing for your online business. We integrate Stripe, Razorpay, PayPal, and other payment providers with secure, PCI-compliant implementations that maximize conversion rates.

Payment processing is the most critical and sensitive component of any e-commerce operation. A poorly integrated gateway leads to failed transactions, cart abandonment, and security vulnerabilities. TechnoSpear engineers payment gateway integrations that are reliable, PCI-compliant, and optimized for conversion — supporting domestic and international payment methods including credit cards, UPI, net banking, wallets, and buy-now-pay-later services.

We implement server-side payment processing with tokenized card vaults, idempotent charge requests to prevent duplicate billing, and webhook-driven order confirmation flows that handle network interruptions gracefully. Our integrations cover Stripe, Razorpay, PayPal, Braintree, Authorize.Net, and CCAvenue, with multi-gateway failover routing that automatically retries failed charges through an alternate processor to maximize successful transactions.

Beyond basic checkout, TechnoSpear builds advanced payment workflows including split payments for marketplace vendors, recurring billing with SCA-compliant authentication for subscriptions, partial refund automation, and real-time payout dashboards. Every integration includes fraud detection hooks, 3D Secure enforcement for high-risk transactions, and detailed transaction logging for reconciliation and dispute resolution.

Technologies We Use

StripeRazorpayPayPalBraintreeNode.jsWebhooks3D Secure 2.0PCI DSSPostgreSQLRedis

What You Get

What's Included

Every payment gateway integration engagement includes these deliverables and practices.

Stripe and Razorpay integration

PayPal and UPI payments

Subscription and recurring billing

Multi-currency payment processing

PCI DSS compliance

Payment analytics and reporting

Our Process

How We Deliver

A proven, step-by-step approach to payment gateway integration that keeps you informed at every stage.

Payment Flow Design

We map the complete payment lifecycle — authorization, capture, refund, chargeback — and define which gateways, currencies, and payment methods your business requires.

Secure Integration Development

Server-side API integration with tokenized payment flows, webhook endpoints for asynchronous event handling, and idempotency keys for safe retries are implemented following PCI DSS guidelines.

Testing & Compliance Validation

Sandbox testing covers successful payments, declined cards, 3D Secure challenges, webhook failures, and refund flows. We verify PCI scope reduction and SSL certificate configuration.

Monitoring & Reconciliation Setup

Transaction monitoring dashboards, automated reconciliation with your accounting system, and alerting for abnormal decline rates or gateway downtime are configured for ongoing operations.

Use Cases

Who This Is For

Common scenarios where this service delivers the most value.

E-commerce stores needing multi-gateway failover to maximize payment success rates across regions

SaaS platforms implementing metered billing, plan upgrades, and prorated subscription charges

Marketplace platforms requiring automated split payments and vendor payout scheduling

Healthcare and education portals processing EMI-based payments with tokenized recurring charges

Need Payment Gateway Integration?

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FAQ

Frequently Asked Questions

Common questions about payment gateway integration.

How do you handle payment failures without losing the customer's order?

We implement a pending-order pattern where the order is created in a reserved state before payment is attempted. If the charge fails, the customer can retry without re-entering their cart. Webhook listeners confirm payment asynchronously, and idempotency keys prevent duplicate charges if the customer clicks the pay button multiple times.

Can you integrate Indian payment methods like UPI and net banking alongside international gateways?

Yes. We typically use Razorpay or Cashfree for Indian payment methods including UPI, net banking, and wallets, while routing international card payments through Stripe. The gateway selection can be automatic based on the customer's currency or location, providing a seamless checkout experience.

What fraud prevention measures are included in your payment integrations?

We implement Stripe Radar or equivalent fraud scoring, enforce 3D Secure authentication for high-risk transactions, validate billing address and CVV mismatches, set velocity limits on repeated charge attempts, and flag orders with mismatched shipping and billing countries for manual review.