Payment Gateway Integration
Stripe, Adyen, Square — done right.
Payment integrations carry real risk — failed charges, double charges, missed webhooks, and PCI scope creep. We build payment integrations with strict idempotency, webhook reliability, and tightly scoped PCI exposure.
Across Stripe, Adyen, Square, Braintree, PayPal, and regional providers.
Common problems
- Double-charges or failed retries
- Missed payment webhooks causing reconciliation issues
- PCI scope expanding unintentionally
- Need subscription, marketplace, or split payments
What's included
- Gateway selection or migration
- Idempotent charge and refund flows
- Reliable webhook handling with replay
- PCI-scope minimization (hosted fields, Elements)
- Subscription, marketplace, or split logic as needed
- Monitoring and reconciliation reports
How we deliver
The same disciplined process across every engagement.
We map your current payment integration setup, surface risks, and align on outcomes before any work begins.
A written plan with deliverables, milestones, owners, and a fixed timeline you can hold us to.
Senior engineers do the work in short iterations with daily updates and zero-surprise change control.
QA, performance checks, documentation, and a 30-day post-launch warranty on everything we ship.
What you can expect
Frequently asked
How fast can you start on payment integration?
Most engagements kick off within 3–5 business days. Emergencies start in under 60 minutes.
Do you sign NDAs and MSAs?
Yes. We're SOC 2-aligned, NDA-ready on day one, and can work under your MSA or ours.
What does pricing look like?
Fixed-fee for defined scopes, monthly retainers for ongoing work, and emergency rates for critical incidents. No long lock-ins.
Who actually does the work?
Senior US/Canada-aligned engineers with 8+ years of experience. No offshore triage, no junior handoffs.
More within API Development & Integrations
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