Solutions architect
The data model, the integrations, and the build order are decided before a line of code, so the scope you see is the scope you get.
Payments are where MVPs stall: Checkout sessions, webhooks, test mode, failed cards, and subscription lifecycle. Lab Twelve builds Stripe wiring as scoped work, often Business App or MVP Sprint plus Stripe add-on when complexity grows. We run Lab Twelve on Stripe ourselves, so the integration patterns are production-tested, not tutorial copy. Webhook idempotency and test scenarios are part of done, not stretch goals.
One fixed price buys a whole product team in one: architect, designer, and AI-native engineer.
The data model, the integrations, and the build order are decided before a line of code, so the scope you see is the scope you get.
Interface, flow, and brand are designed for this build, not dropped onto a template. The finished app looks like it was meant to ship.
Senior execution at AI speed, in production with the source code in your hands. One builder with the range of a whole product team.
| Stripe Checkout or billing wiring | Included |
|---|---|
| Webhook handlers | Included |
| Test mode verification | Included |
| Customer auth tied to billing | Included |
| Deploy with env documentation | Included |
Stripe Checkout or billing wiring: Per scope
Webhook handlers: Idempotent, logged
Test mode verification: Before live keys
Customer auth tied to billing: When in scope
Deploy with env documentation: You hold Stripe keys
| Merchant of record consulting | Not in base scope |
|---|---|
| Marketplace Connect splits | Not in base scope |
| PCI SAQ beyond Stripe-hosted | Not in base scope |
Merchant of record consulting: We integrate Stripe, not tax law
Marketplace Connect splits: Scope separately if needed
PCI SAQ beyond Stripe-hosted: Use Checkout/Elements patterns
A representative ScopeSpec ticket. Yours is assembled live from the scope chat, priced by the engine, and locked before you pay.
Payment model locked
One-time vs subscription, products.
Checkout + customer portal hooks
Test mode green.
Webhooks + idempotency
Production-safe handlers.
Go-live checklist
Live keys, monitoring.
Business App includes Stripe-ready hooks. Full billing flows often add the Stripe billing add-on or MVP scope.
Checkout for speed unless scope demands embedded Elements.
You do. We wire the integration and document env vars.
No agency to manage, no roster to assemble. The whole team, one number, source code in your hands.