---
title: "Web Application Development: Kensink Labs"
description: "Custom web application development from a senior lab: Next.js, TypeScript, Postgres, eval-tested, full source ownership in eight weeks."
source: "https://www.kensink.com/services/web-application-development/"
canonical: "https://www.kensink.com/services/web-application-development/"
---
★ Web application development Project Types 8-week engagement

PROJECT TYPE · WEB APPLICATIONS

# Custom web applications. Auth, data, workflows, owned by your team.

Real software in the browser: auth, data, dashboards, and workflows. We build web applications that a team can run and extend long after we hand them over.

Next.js TypeScript PostgreSQL Cloudflare

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

Cycle

8 weeks · fixed price

Stack

Next.js + Postgres

Output

Production code + eval suite

Handoff

Full source ownership

\[THE SHORT VERSION\]

## A web app is real software, with all that implies.

The line that matters: a marketing site presents content, a web application does work. Auth, roles, data models, integrations, and stateful workflows. That distinction drives the whole build. We treat a web app like the long-lived system it is: typed, tested, observable, and yours at handoff.

When it fits

-   Internal or customer-facing tools with real workflows
-   Dashboards, portals, and data-heavy products
-   Anything past the reach of a CMS or no-code tool

When it does not

-   A content site, which is a marketing website build
-   A native-feature-heavy product, which leans mobile

\[HOW WE BUILD IT\]

## How we build with Web application development.

01

### Model the domain

We start with the data and the workflows, not the screens. The schema and the API contract come first.

02

### Build on Next.js + Postgres

Typed end to end, server-first rendering, and a database designed for the real queries. Boring foundation, modern surface.

03

### Eval and test the seams

Automated tests on auth, data, and the workflows that break. We measure before we ship.

04

### Ship and hand over

Deployed with monitoring, documented, and handed over with full source ownership and a 90-day warranty.

\[ WHAT YOU GET \]

## What the engagement leaves behind.

8 wks

Problem to production

Typed

Contract to UI

100%

Source ownership at handoff

90 days

Post-launch warranty

\[COMMON QUESTIONS\]

## Questions we get asked.

How is this different from a marketing website?

A marketing site presents content and optimizes for SEO and conversion. A web application does work: it has accounts, permissions, data, and workflows. The engineering, testing, and architecture are a different order of effort.

What stack do you use?

Usually Next.js and TypeScript on the frontend and API, PostgreSQL for data, and Cloudflare or a Node runtime for hosting. We choose per project, but we default to typed, boring, well-supported tools.

Share[](https://twitter.com/intent/tweet?url=https%3A%2F%2Fwww.kensink.com%2Fservices%2Fweb-application-development%2F&text=Web%20application%20development%20%C2%B7%20Project%20Types)[](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fwww.kensink.com%2Fservices%2Fweb-application-development%2F)

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

\[RELATED\]

## Worth a look next.

[

Languages

Next.js

Read more

](https://www.kensink.com/languages/nextjs)[

Project Types

SaaS product development

Read more

](https://www.kensink.com/services/saas-product-development)[

Project Types

Marketing website

Read more

](https://www.kensink.com/services/marketing-website)

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)