OutsideHireBook a discovery call
← All services
Service

Payment integration development

Connecting to a processor, gateway, or card network is where most roadmaps stall, because the certification, edge cases, and scheme rules eat months. We have done this work for Top-10 US processors and large ISOs, so we wire up the rails, pass the testing, and move money reliably across every channel you sell on. You get a working, certified integration instead of a half-finished one your team keeps reopening.

What we build

Processor and gateway integrations against your existing stack or a new acquirer
Card-network connections (Visa, Mastercard, Amex, Discover) and the certification work that comes with them
Bank rails: ACH, RTP, FedNow, and SEPA for payouts, debits, and account-to-account flows
Digital wallets including Apple Pay and Google Pay for in-app and online acceptance
3-D Secure and SCA flows that reduce fraud without tanking conversion
End-to-end certification, sandbox testing, and production cutover support
Why payments-native matters

Integrations break on the details: interchange qualification, settlement timing, decline handling, and scheme mandates that generalist engineers learn on your dime. Our team already knows them, so we skip the ramp and ship a connection that holds up in production.

Related services

Most engagements combine a few of these. Here is what pairs well.

Let's scope your payments build.

Book a discovery call with engineers who already speak gateways, processing, settlement, and compliance. We'll talk through your goals and the right way to build it.