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Fintech Integration

Secure Payment Gateway Integrations That Reconcile Perfectly

Integrate Razorpay, Stripe, PayPal, and regional gateways with robust webhook reconciliation, multi-currency support, and zero payment drops.

100% NDA Protection Direct Engineer Access Milestone Scoping
Service Deep Dive

Frictionless, Secure Transactions For Your Customers

Payment processing is the most critical juncture in any online business. A poorly wired payment integration results in dropped transactions, failed order confirmations, and messy accounting reconciliations. Zooye connects payment gateways directly via server webhooks, ensuring transactions are verified cryptographically before orders are fulfilled.

Technical Scope

What We Engineer & Deliver

Comprehensive technical capabilities delivered with disciplined execution and zero cutting corners.

01

Stripe, Razorpay & PayPal APIs

Integrating checkout sessions, card elements, UPI, net banking, and digital wallets.

02

Cryptographic Webhook Handlers

Server-side signature verification ensuring orders only fulfill on confirmed payment capture.

03

Automated Invoicing & Receipts

Instant GST-compliant invoice generation and automated email receipts on success.

04

Refund & Subscription Webhooks

Handling recurring subscription charges, failed payment retries, and automated refunds.

Strategic Value

Key Business & Technical Advantages

How this specialization directly accelerates your commercial velocity and technical resilience.

BENEFIT 01

Highest Payment Success Rates

Clean checkout UI with localized payment options (UPI, Netbanking, Cards) maximizes conversions.

BENEFIT 02

Zero Mismatched Orders

Webhook-driven status confirmations ensure no customer ever pays without an order being created.

BENEFIT 03

PCI-DSS Compliant Security

Sensitive card data is handled exclusively by tokenized gateway servers, never touching your database.

BENEFIT 04

Automated Financial Reconciliation

Transaction IDs and fee structures align perfectly for simplified accounting.

Execution Steps

Our Delivery Methodology

A structured, checklist-driven milestone process from kickoff to post-launch stabilization.

01

Gateway Setup

Configuring merchant credentials, currency settings, and webhook secret keys.

02

Checkout Build

Integrating checkout UI, payment method selectors, and error handling states.

03

Webhook Testing

Simulating successful, failed, and expired payment webhooks in sandbox mode.

04

Live Cutover

Switching to live API keys, executing a real verification transaction, and verifying settlement.

Direct Answers

Frequently Asked Questions

Common technical and engagement inquiries regarding Payment Gateway Integration.

For Indian customers, Razorpay and Cashfree provide the best UPI and card success rates. For international sales, Stripe is the global standard.

We utilize asynchronous server webhooks. The moment the gateway confirms payment, our server updates the database even if the user closed their tab.

Yes. We integrate recurring subscription APIs (Stripe Billing or Razorpay Subscriptions) with automated renewal charges.

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Start Your Next Sprint

Ready To Engineer Your Payment Gateway Integration?

Share your project specifications, RFP requirements, or agency partnership goals. Our technical leads will analyze your scope and return with a fixed proposal within 1–2 business days.

DIRECT GUARANTEE

Full Engineering Commitment

100% NDA-Protected
Direct Developer Access
Fixed Milestone Scoping
Warranty Post-Launch Support
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