# Payment Gateway Integration: A Developer's Guide

DevFeed: [Payment Gateway Integration: A Developer's Guide](<https://devfeed.tech/articles/payment-gateway-integration-a-developer-s-guide-10241.md>)

Original publisher: [Read original article](<https://dodopayments.com/blogs/payment-gateway-integration-guide/>)

Author: Ayush Agarwal

Published: 2026-04-13T00:00:00Z

Content type: tutorial

Language: en

Sources: [Dodo Payments Blog](<https://devfeed.tech/sources/dodo-payments-blog.md>)

Topics: [Back end](<https://devfeed.tech/topics/backend.md>), [Code](<https://devfeed.tech/topics/code.md>), [Front end](<https://devfeed.tech/topics/frontend.md>), [Software as a service](<https://devfeed.tech/topics/saas.md>)

Tags: [architecture](<https://devfeed.tech/tags/architecture.md>), [backend](<https://devfeed.tech/tags/backend.md>), [billing](<https://devfeed.tech/tags/billing.md>), [checkout](<https://devfeed.tech/tags/checkout.md>), [developer-guide](<https://devfeed.tech/tags/developer-guide.md>), [developers](<https://devfeed.tech/tags/developers.md>), [gateway](<https://devfeed.tech/tags/gateway.md>), [guide](<https://devfeed.tech/tags/guide.md>), [integration](<https://devfeed.tech/tags/integration.md>), [payments](<https://devfeed.tech/tags/payments.md>), [tax](<https://devfeed.tech/tags/tax.md>), [testing](<https://devfeed.tech/tags/testing.md>), [webhooks](<https://devfeed.tech/tags/webhooks.md>), [workflows](<https://devfeed.tech/tags/workflows.md>)

## AI overview

A developer guide to production-ready payment gateway integrations, covering checkout initiation, customer and order mapping, payment state management, webhook processing, fulfillment, recovery, testing, tax-aware billing, and checkout model selection. It also discusses using a Merchant of Record such as Dodo Payments.

## Source excerpt

Learn how to plan, build, and ship a payment gateway integration with checkout, webhooks, tax, and post-payment workflows that scale globally.