API Development & Integrations
Payment Gateway Integration
Stripe, PayPal, Razorpay integration
Node.jsExpress.jsNestJSOverview
Professional Payment Gateway Integration Development Services
Payment gateway integration enables your application to accept online payments securely and reliably. Whether integrating Stripe, PayPal, Razorpay, or other payment processors, proper implementation ensures PCI compliance, handles edge cases, provides excellent user experience, and maximizes successful transactions. Our payment integration specialists implement complete payment flows including card payments, digital wallets, UPI, bank transfers, international payments, subscription billing, refunds and disputes, and webhook handling for payment events.
From e-commerce checkouts to SaaS subscriptions, marketplace payouts, and in-app purchases, we handle all payment scenarios. Implementation includes saving payment methods for future use, 3D Secure authentication for security, handling failed payments gracefully, implementing payment retry logic, supporting multiple currencies, calculating and collecting taxes, generating payment receipts, and providing payment analytics. Smooth payment experiences increase conversion rates and reduce cart abandonment.
What we offer
Payment Gateway Integration Development Services, scoped to your requirements.
Every engagement is built from these capabilities — combined and sized to the outcome you need.
Stripe payment processing integration
PayPal checkout implementation
Razorpay for Indian payments
Credit card and digital wallet support
Recurring billing and subscriptions
Refund and dispute management
PCI DSS compliance
Payment analytics and reporting
Why HACTECH
A partner for your Payment Gateway Integration Development needs.
Senior-led engineering, transparent delivery and systems built to be maintained long after launch.
Payment Experts
Deep experience with Stripe, PayPal, Razorpay, and other processors.
PCI Compliance
Implement secure payment flows maintaining PCI DSS compliance.
Conversion Optimization
Optimize checkout flows to maximize successful payment conversions.
Multiple Methods
Support cards, wallets, UPI, bank transfers, and buy-now-pay-later.
Our process
A structured path to production-grade payment gateway integration development services.
- 01
Requirements
Define payment methods, currencies, subscription needs, and compliance requirements.
- 02
Gateway Selection
Choose optimal payment gateway based on geography, fees, and features.
- 03
Integration
Implement payment processing, webhook handling, and error scenarios.
- 04
Security Testing
Test payment security, PCI compliance, and secure data handling.
- 05
Go Live
Switch from test to live mode with monitoring and alerting.
- 06
Optimization
Monitor success rates and continuously optimize payment flows.
Technologies & tools
The stack behind our Payment Gateway Integration work
- Stripe
- PayPal
- Razorpay
- Node.js
- Webhooks
Common use cases
Where Payment Gateway Integration delivers the most value
- 01E-commerce checkout with card and wallet payments
- 02SaaS subscription billing with recurring charges
- 03Marketplace platforms with split payments and payouts
- 04Mobile apps with in-app purchase integration
FAQ
Questions about Payment Gateway Integration
Not covered here? Ask us directly — we reply within one business day.
Which payment gateways do you integrate?
We integrate Stripe, PayPal, Razorpay, Square, Braintree, Authorize.net, and regional gateways. We recommend based on your location, business type, and fee structures.
Is payment integration secure?
Absolutely! We follow PCI DSS compliance, use tokenization (never store card data), implement SSL/TLS, validate transactions server-side, and use 3D Secure for additional security.
Can you integrate multiple payment methods?
Yes! We support credit/debit cards, bank transfers, digital wallets (Apple Pay, Google Pay), cryptocurrency, buy-now-pay-later (Klarna, Afterpay), and local payment methods.
Do you handle subscription billing?
Yes, we implement recurring billing, subscription management, trial periods, plan upgrades/downgrades, prorated billing, dunning management, and invoice generation.
What if payment gateway goes down?
We implement failover to backup gateway, queue transactions for retry, send alerts, and provide clear user messages. We monitor gateway uptime and handle edge cases gracefully.
Let's talk
Ready to build with Payment Gateway Integration?
Tell us about the product and the outcome you need. We will come back with an assessment, an approach and an honest estimate.