Kensink Labs
Stripe & PaymentsTechnologies & Infrastructure8-week engagement
PAYMENTS · STRIPE + MORE

Production payments with Stripe. Idempotent capture, reconciliation, multi-processor.

Stripe and other processors behind one clean abstraction, with idempotent capture, refunds, webhooks, and reconciliation. We have shipped multi-processor payments in production.

Payment APIPayment processor APIsPostgreSQL
Cycle
8 weeks · fixed price
Stack
Stripe + others
Output
Production code + eval suite
Handoff
Full source ownership
[THE SHORT VERSION]

The money has to tie out, every time.

Payments look simple in the demo and get hard in production: idempotency, webhook reliability, partial refunds, disputes, and reconciliation against the processor. We treat payments as a state machine with an audit trail, and we have run several processors behind one abstraction (see the Nuforce case).

When it fits
  • Subscriptions, marketplaces, and one-time payments
  • Products needing multiple processors behind one interface
  • Anywhere money movement must reconcile and audit cleanly
[HOW WE BUILD IT]

How we build with Stripe & Payments.

01

Scope and fit

We decide where Stripe & Payments earns its place in your system, and where a simpler tool wins. No resume-driven architecture.

02

Build on a tested foundation

We integrate Stripe & Payments against a foundation we trust: typed code, CI, and observability from the first commit. Boring infrastructure, modern surface.

03

Eval before launch

An eval suite proves the build behaves before it reaches a user. We measure, then ship.

04

Handoff with ownership

Your team gets the code, the tests, and a runbook. No lock-in to us or to a vendor framework.

[WHAT YOU GET]

What the engagement leaves behind.

Senior
Engineers who have shipped this before
100%
Source ownership at handoff
Eval-first
Tested before it ships
0
Framework lock-in
APPLIED K-FRAMEWORK

Bring the problem.
We’ll bring the build.

Senior engineers, eval suite at handoff, full source ownership. Sprint, program, or ongoing. We shape the engagement to the work.