Case study · Fredericksburg, VA
POS Web Extension
Built for a Fredericksburg-area auto repair shop stuck on a legacy POS. OnCode shipped a browser extension so the shop takes card and ACH on its own rails, sets its own payment criteria, and cuts the cost of vendor payment lock-in—and the same pattern works for shops beyond the DMV.
Where this ran
Local proof. Portable pattern.
- Location
- Fredericksburg area, Virginia — OnCode's home market in the DMV.
- Client context
- Auto repair shop on a legacy POS / shop management stack (including Tekmetric-connected workflows).
- Deliverable
- Custom browser extension (POS Pay): card + ACH on shop-owned rails without replacing the POS.
The product
POS Pay: payments owned by the shop, not the POS vendor.
The problem
The shop software worked. The payment path did not serve the shop.
For this Fredericksburg-area repair shop—and for many operators on the same stack—day-to-day ops run on a legacy point-of-sale and shop management system. Leaving that stack was not realistic. Staying on it meant payments, fees, and payment rules were still dictated by the vendor. They needed a way to keep the system staff already know and still control how money moves: lower cost, their own criteria, and no permanent lock-in on the payment rail.
The build
A web extension that reroutes payments through a layer the shop controls.
We built a browser extension that connects to the existing POS (including Tekmetric-connected shops) and gives staff a clear payment surface: card (keyed or saved) and ACH bank transfer. Payments go through the extension path instead of the default vendor route, so the business can apply its own payment criteria and cost structure while the legacy UI stays in place for the rest of the workflow.
Reroute, do not replace
The shop keeps its legacy POS. The extension sits on top and owns the payment step.
Control cost
Shops stop absorbing vendor payment lock-in and can run payments on terms they choose.
Own the criteria
Card and ACH rules live in the extension layer, not only inside the vendor stack.
Works where staff already are
Browser-based, connected to the shop system they already open every day.
The result
Thousands saved by not staying locked into the vendor payment system.
The shop keeps the operational software it depends on and takes payments through a path it controls. That shift reduces payment cost, opens room for shop-defined payment rules, and avoids the slow bleed of full vendor lock-in. For the businesses running the extension—including this Fredericksburg-area operator—the practical outcome is thousands of dollars kept instead of lost to a payment stack they never chose on purpose.
Client review
“Oncode and Sydney have been great to work with. Sydney knows his business and is a master at keeping projects on track. We've hit every milestone early or on time. He is flexible with his communication and patient when priorities change.”
FAQ
Local delivery. National-ready pattern.
Do you build custom software for businesses in Fredericksburg?
Yes. OnCode is based around Fredericksburg, Virginia and builds custom software, browser extensions, web apps, and AI automation for local operators and remote clients. This POS Pay extension was built for a Fredericksburg-area auto repair shop.
Can other shops outside Fredericksburg use a POS extension like this?
Yes. The pattern is portable: keep the legacy POS staff already know, put a browser extension on top for card and ACH, and own the payment criteria and cost structure. We have shipped this for a Fredericksburg-area shop and can adapt it for repair shops and similar operators elsewhere in the DMV or nationwide.
Is this the same as hiring a web design agency?
No. This is a custom payment and workflow layer on top of shop software—not a marketing website. OnCode is an AI automation and software firm: we build extensions, automations, sites, and apps when the operation needs them.
What POS systems does this work with?
The build connects to the shop's existing point-of-sale and shop management stack, including Tekmetric-connected shops. The point is to reroute payments without forcing the shop to abandon the system they run every day.
Next step
Stuck inside a system that owns your payments?
Whether you're in Fredericksburg, the wider DMV, or remote—we build the layer on top: extensions, payment flows, and workflows that keep your ops stack and give you back control of cost and criteria.