E-Commerce Development

Payment Gateway Integration

Payment flows that handle the failure cases, not just the happy path.

Outcome: Payments that balance to the penny without anyone checking by hand.

What we usually find

The integration works in test. In production, webhooks arrive twice, a customer is charged for an order that never saved, and reconciliation becomes a monthly manual exercise.

What the work covers

Scope is agreed in writing before anything starts. If a line here is not relevant to you, it comes out of the plan and out of the price.

  • Idempotent payment handling with a durable event log
  • Webhook verification, retry and replay protection
  • 3D Secure, SCA and regional payment method support
  • Refunds, partial captures, disputes and chargeback flows
  • Reconciliation reporting against the provider ledger

Typical tooling

Indicative, not fixed. The stack follows your constraints and your team, not our habits.

  • Stripe
  • Razorpay
  • PayPal
  • Node.js
  • PostgreSQL

More in E-Commerce Development

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Need Payment Gateway Integration?

Bring us the problem rather than a spec. We will tell you what it takes, what it costs, and what we would leave out.

Book a scoping call hello@iryst.com