Why does taking a card payment still require months of engineering?
The integration was never the hard part. The maintenance was.
Ask any software company that has integrated a payment SDK what it cost them, and the answer is never just the integration. It's everything after: the OS update that broke the Bluetooth stack, the new terminal model that needed a different driver, the SDK upgrade that changed the API, the certification cycle that returned with every release.
A payment SDK hands you a list of jobs that have nothing to do with your product: native apps for each platform, device drivers, EMV behavior, printer quirks, version compatibility across a fleet of hardware you didn't choose. Each one is small. Together they become a second engineering team you didn't plan to hire — working forever on a feature your users assume just works.
The complexity didn't disappear. It moved.
Kuvex is built on a simple reassignment of responsibility: everything on that list is our infrastructure, not your burden. Payments, printing, scanning, device management and security run inside the Kuvex Commerce Runtime, on hardware we certify and maintain. Your web app calls pay(). That's the integration.
We hold ourselves to a blunt test: a developer who has never seen Kuvex should make their first payment in under thirty minutes, and a production integration should take days — not months. Any design decision that makes those numbers worse is, by definition, wrong.