Engineering — Custom Web Apps

Custom web app development, scoped to what you need

Admin dashboards, user accounts, databases, payments — real software built on Next.js and Postgres, quoted per project.

Engineering team planning a web application at a whiteboard
Photo by ThisIsEngineering on Pexels

Ali Samadi Agency builds custom web applications for businesses that have outgrown a simple website: admin dashboards, customer portals with user accounts, booking and payment flows, and internal tools backed by a real database. Every app is built on the same production stack as our websites — Next.js, React, and Postgres — so it's fast, secure, and maintainable by any competent developer, not just us. We scope the project together first and quote it fairly before any work begins.

What you get with our custom web apps

Real software, small-team speed

Authentication, databases, dashboards, and payments — the same engineering patterns large products use, delivered without agency overhead.

Scoped before it's priced

We define what the app does, what it won't do, and what it costs — in writing — before development starts. No open-ended billing.

Built to hand over

Standard stack, clean code, your repository. If you grow into an in-house team someday, they inherit a codebase they'll recognize.

Starts as small as you need

A v1 with the core feature beats a year-long spec. We ship the essential version first, then grow it against real usage.

How it works

01

Scoping call

We map what the app must do, who uses it, and what data it manages.

02

Written proposal

Fixed scope, timeline, and price. You know the total before we start.

03

Build in stages

You see working software early and often — not a big reveal at the end.

04

Launch & support

Deployed to production with monitoring; support and iteration scoped as you grow.

Common questions

How much does a custom web app cost?

It depends entirely on scope — a simple portal with accounts is a different project from a booking system with payments. That's why we scope first and quote a fixed price in writing before any work begins.

What can a custom web app include?

User accounts and authentication, admin dashboards, databases, file uploads, payments and subscriptions via Stripe, email notifications, and integrations with tools you already use.

What stack do you build on?

Next.js and React for the application, Postgres for data, and Stripe for payments — a standard, battle-tested stack that any professional developer can maintain after us.

Can you extend an app you didn't build?

Sometimes — it depends on the state of the existing code. We review it first and tell you honestly whether extending or rebuilding is the better investment.

Helpful resources

Related services

Ready to get started?

Simple, transparent pricing — and a real person on the other end. Simple sites ship in one day once your project is confirmed.