Payment Gateway Integration
Payment integrations that operations and finance can reconcile
We connect payment providers into checkout, subscriptions and back-office flows — with webhooks, idempotency and the failure states that actually happen in production.
Definition. Payment gateway integration is the engineering of authorized payment capture, stored credentials where appropriate, webhooks, refunds and reconciliation between the provider, your application and finance systems.
A ‘Pay now’ button is not a payments architecture
Timeouts, double submits, partial captures, disputes and webhook delays are the real project.
Duplicate charges
Retries without idempotency create finance incidents.
Webhook faith
Assuming every event arrives once, in order, is how ledgers drift.
Checkout vs records
The customer saw success; your order system did not.
Capabilities
What we build
Specific delivery, not a vague capability list.
Checkout connections
Web and mobile payment flows using the provider’s supported integration model.
Billing and subscriptions
Plan changes, dunning and entitlement tied to payment state.
Reconciliation hooks
Events finance and operations can trust, including refunds and failures.
Solutions
Common implementation scenarios
New checkout
Add a provider without inventing your own card handling.
Replace a brittle plugin
When the app almost works but refunds and webhooks do not.
Shopify plus another processor
When merchandising is on Shopify but a specific payment path is required.
How we work
Development process
01
Discovery
We clarify the business problem, current systems, constraints, success metrics and decision-makers before recommending a build.
02
Strategy
We define the product scope, delivery sequence and commercial trade-offs so engineering work maps to a measurable outcome.
03
Architecture
We design the application, data, integration and security model before implementation starts, reducing rework later.
04
UI/UX
We design the interfaces operators and customers will actually use — with clarity, accessibility and conversion in mind.
05
Development
We implement in short, reviewable increments with staging environments and visible progress against the agreed scope.
06
QA
We test functional flows, edge cases, integrations, performance and release readiness before anything reaches production.
07
Launch
We ship with a controlled cutover, monitoring and a clear rollback plan so go-live is an operational event, not a gamble.
08
Support & Optimization
After launch we stabilize, measure and improve — fixing issues quickly and iterating on the features that affect the business.
Stack
Technologies
- Node.js
- TypeScript
- PostgreSQL
- Shopify APIs
- AWS
Industries
Where this service is typically used
Ecommerce
We help ecommerce businesses build Shopify experiences, operational AI, mobile clients and the integrations that keep catalog, orders and inventory honest.
SaaS
We help software companies ship AI capabilities, integration surfaces and mobile clients that respect tenancy, metering and a roadmap you can maintain.
Retail
We help retailers connect commerce, operations apps and back-office systems so availability, orders and exceptions are not a manual sport.
Engagement
How we work commercially
Fixed scope
A defined outcome, timeline and budget after discovery. Best when requirements are clear enough to estimate with confidence.
Dedicated team
A stable product squad that works as an extension of your team across a roadmap, not a one-off ticket list.
Ongoing development
Retained engineering capacity for iteration, integrations, maintenance and new capabilities after the first release.
Consulting
Architecture, vendor selection, AI feasibility, Shopify Plus planning or integration design without a full build engagement.
FAQ
Questions about payment gateway integration
We integrate providers selected for the market and product. The important part is a correct charge, webhook and refund model — not a logo wall.
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Learn moreNext step
Plan a payment integration
Tell us the provider, the selling motion, and where orders are recorded. We will design the charge and reconciliation path.