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MVP NINJA

Your prototype works in the demo. Now make it hold up with real users.

AI app builders are a fast way to test an idea. They usually stop short of what paying users need: sign-in that can't be bypassed, data rules that keep one customer's records away from another's, payments that reconcile, and code someone can change next month. We keep what works, fix what doesn't and put it live on accounts you own.

Ideal for

  • Founders with a working prototype and first users waiting
  • Anyone about to take payments or personal data in an AI-built app
  • Teams whose app broke after a change nobody can trace

What it does, and why it matters

  • Feature: A security and data review first

    OutcomeYou see what's exposed: keys in the browser, open database tables, unguarded routes

    Business valueThe risks that could hurt users are fixed before you invite them

  • Feature: Keep what works, replace what doesn't

    OutcomeYour screens and flows stay; the weak parts are rebuilt

    Business valueYou don't pay to start over

  • Feature: Production basics

    OutcomeReal sign-in and roles, verified payments, backups and error alerts

    Business valueThe product survives its first hundred users

  • Feature: Code in your repository

    OutcomeReadable, typed code in your GitHub with a deploy pipeline

    Business valueAny developer can pick it up later, including you

What we usually fix

  • Lovable or Bolt with Supabase

    Row-level security on every table, secret keys moved off the browser, and sign-in flows checked end to end.

  • Replit or Cursor prototypes

    Moved into a proper repository with environments, a real database and deploys you can repeat.

  • Payments that add up

    Stripe webhooks verified, subscriptions kept in sync, failed payments handled instead of ignored.

  • The app that broke after a change

    We trace what the last round of prompts changed, fix it, and add the tests that stop it happening again.

  • Slow or expensive to run

    Slow queries, missing caching and runaway AI usage found and fixed before the bill arrives.

What it usually costs

Hardening one core flow fits the 7-Day Sprint. A prototype that also needs new features or a new data model fits the 14-Day Build.

Building blocks we use

  • Lovable, Bolt, Replit, Cursor and v0 code
  • Supabase with row-level security
  • Next.js or React
  • Stripe with verified webhooks
  • GitHub, CI and your own hosting

Usually

7-Day Sprint

$1,500Fixed · 7 days

A focused first version that tests your biggest assumption with real people.

  • 1 core workflow
  • Up to 5 screens
  • 1 user role

Your product gets its own written scope and fixed price before anything starts. Compare packages

What it’s like to work with Ali.

43 contracts · 100% Job Success
Upwork review: Expo SDK 50 app upgrade

Really good freelancer, who works quickly and efficiently. On top of that, he works within a fair budget.

Upwork review: Mobile app repair and ongoing maintenance

Great problem solver. Explains programming and functionality in easy to understand ways.

Upwork review: Mobile app repair

Ali and [t]eam quickly identified my problem and helped me get my app back up and running.

Common questions

Why not build it myself with Lovable, Bolt or Cursor?

For a quick prototype, you should. They're great for testing a screen or a flow. The gap shows up when real people use it: sign-in that holds up, payments, data you can't afford to lose, errors you hear about, and code a developer can keep building on. That's the part we do. If you've already built a prototype, send it with your brief. It's a useful starting point.

Will you rewrite my prototype from scratch?

Only the parts that need it. We start by reviewing the code, the database rules and the payment flow, then keep the screens and flows that work and replace what won't hold up. The written scope says which is which before any work starts.

7–21 daysFrom $1,500

Start my brief