---
title: "E-commerce Development: Kensink Labs"
description: "Custom e-commerce from a senior lab: storefront, checkout, reconciling payments, headless where it helps. Full source ownership."
source: "https://www.kensink.com/services/ecommerce-development/"
canonical: "https://www.kensink.com/services/ecommerce-development/"
---
★ E-commerce development Project Types 8-week engagement

PROJECT TYPE · E-COMMERCE

# E-commerce that reconciles. Catalog, checkout, payments, production-grade.

Catalog, cart, checkout, and payments that reconcile. We build commerce on a modern stack, headless where it helps, with payments that survive production.

Next.js Payment API PostgreSQL

[Start a conversation →](https://www.kensink.com/contact) [All project types →](https://www.kensink.com/services)

Cycle

8 weeks · fixed price

Stack

Next.js + Stripe

Output

Production code + eval suite

Handoff

Full source ownership

\[THE SHORT VERSION\]

## The catalog is easy. Checkout and money are not.

Storefronts are straightforward; the hard, revenue-critical parts are checkout, inventory accuracy, and payments that reconcile. We build commerce with idempotent payment flows, honest inventory handling, and a fast, search-friendly storefront, headless when flexibility is worth it.

When it fits

-   Custom storefronts beyond off-the-shelf platforms
-   Commerce with complex catalog, pricing, or fulfillment
-   Headless commerce across multiple channels

\[HOW WE BUILD IT\]

## How we build with E-commerce development.

01

### Scope and fit

We decide where E-commerce development earns its place in your system, and where a simpler tool wins. No resume-driven architecture.

02

### Build on a tested foundation

We integrate E-commerce development 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

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[View .md](https://www.kensink.com/services/ecommerce-development.md)

\[RELATED\]

## Worth a look next.

[

Technologies

Stripe & Payments

Read more

](https://www.kensink.com/technologies/stripe-payments)[

Design Patterns

Headless & API-first

Read more

](https://www.kensink.com/patterns/headless-api-first)[

Project Types

Web application development

Read more

](https://www.kensink.com/services/web-application-development)

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.

[Start a conversation →](https://www.kensink.com/contact) [Read the K-Framework](https://www.kensink.com/k-framework)