When to Stop Vibe Coding and Hire a Developer

Andrej Karpathy coined the term vibe coding in February 2025. It means building software by prompting AI tools and accepting what they generate without reading it closely. If you've built something this way and it's starting to creak, you're probably weighing vibe coding vs hiring a developer. This post is about where that line sits, and what a developer actually does once they take over.

What vibe coding is good for

Quite a lot, honestly. A clickable prototype you can put in front of ten potential customers by Friday. An internal tool that turns a messy spreadsheet into a dashboard only your team will see. A landing page with a sign-up form to test whether anyone wants the thing before you spend real money building it. A one-off script that renames a few thousand product images.

What these have in common is a low cost of failure. If the prototype breaks during a demo, you restart it. If the internal tool loses a row, someone retypes it. Nobody outside the company depends on it, and no stranger's card details pass through it.

The trouble starts when a prototype quietly becomes the product.

Signs the app has outgrown it

Security problems are the hardest to spot from the outside. AI tools will happily put an API key straight into the code that runs in the visitor's browser, where anyone can open developer tools and copy it. Login might work while permissions don't: a logged-in user changes a number in the URL and sees someone else's orders. The app looks fine. It isn't.

Then there's money and data. Once the app takes payments, a bug stops being an annoyance and starts costing you refunds, chargebacks or a payment provider's attention. Data loss is similar. If there are no backups, or a migration script can wipe a table, one bad prompt can delete months of customer records.

The other signs are about the code itself, and you'll probably feel them before you can name them:

• Pages are slow, and asking the AI to speed them up doesn't help. A common cause is a page that pulls every record from the database and filters it in the browser, which feels fine with a handful of test rows and drags once real customers arrive.
• Every change breaks something somewhere else.
• There are no automated tests, so the only way to know if something works is to click through it.
• Nobody, including you, can explain how a given part of the code works.
• The AI tool keeps 'fixing' the same bug, and it keeps coming back.

That last one matters more than it sounds. Code nobody understands can't be fixed with confidence, only patched and hoped over.

A 10-question self-check

Answer these honestly. If you say no to any of the first four, stop adding features and get the code looked at.

1. Are all API keys and secrets kept on the server, out of anything the browser downloads?
2. Can a logged-in user only see and change their own data, even if they edit a URL or a request?
3. If the app takes payments, are prices and order totals checked on the server?
4. Is there an automatic backup of the database, and have you ever restored from it?
5. Is the code in a Git repository with a history you could roll back to?
6. Does anything run automatically to check the app still works after a change?
7. Do your main pages load quickly on a mid-range phone over mobile data?
8. Can you add a small feature without something unrelated breaking?
9. Could you explain to someone else how a request moves through the app?
10. If the AI tool you used disappeared tomorrow, could the app still be maintained?

Rescue or rebuild

In our view, a vibe coded app is usually worth rescuing. A rebuild is tempting because a fresh start feels clean, but you lose working features and the small fixes that made them work, and it takes longer than anyone expects.

We'd lean towards rescue when the app runs on a mainstream stack, the data model roughly fits the business, and the problems are concentrated in a few places, for example an exposed key, missing permission checks and a couple of slow queries. Those are fixable inside the existing code, and the parts that already work keep working while they're fixed.

A rebuild makes more sense when the data model is wrong at the root (orders stored in a way that can't support refunds, say), when the app depends on a tool or service you can't move away from, or when fixing one area keeps exposing two more. In that case it's often quicker to keep the prototype as a working spec and write the real product next to it.

You won't know which you're facing until someone reads the code. That's what an AI-generated code audit is for: a developer goes through the codebase and writes down what's risky, what's fine and what each fix would take. Ask for the findings and the estimate in writing before agreeing to any repair work.

The first weeks of a takeover

Nobody should start by adding features. A developer taking over a vibe coded app spends the opening days reading: how data moves, where secrets live, which parts the business can't do without.

Security fixes come next, because they're the ones that can hurt you while everything else is being sorted out. Exposed keys get rotated (a key that was ever in the browser has to be treated as public) and moved to the server. Permission checks go in where they're missing. Outdated dependencies get updated, and any account logins still sitting with the original tool or a freelancer get moved into your name.

After that, tests. Not for everything at once. They start with the paths that make or lose money, like sign-up, checkout and anything that writes to the database. Those tests run in CI on every change, so a fix in one place can't silently break another. That's the direct answer to "every change breaks something."

The way work is done changes too. On our engagements every change goes into your Git repository as a pull request, a senior developer reviews mid-level work before it's merged, and you get a weekly demo or written report of what shipped. Documentation gets written as the code is understood, so the next person doesn't have to start from zero.

None of this means you have to stop using AI tools. Plenty of developers use them every day. The difference is that someone reads what they produce before it reaches your customers. If that's the help you need, our contract developers page explains how we work and what it costs, and you can reach us through the contact form.

Questions people ask

Can a vibe coded app be fixed?

Usually. If the data model fits the business and the problems sit in specific places, a developer can fix the app in its existing code. A rebuild is for apps that are wrong at the foundation, such as a data model that can't support how the business actually works.

What is an AI-generated code audit?

A developer reads the codebase and writes up its security gaps, fragile areas and missing tests, along with what each fix would involve. It's how you decide between rescue and rebuild.

Is vibe coding safe for an app that takes payments?

Only once someone has checked that prices and totals are verified on the server, secrets stay off the client, and payment events are handled correctly. Until then, treat it as a prototype.

Should I keep building features while a developer fixes the code?

Pause big features until the security fixes and core tests are in. Small changes are fine if they go through the same pull requests and review as everything else.

Can I keep using AI tools after hiring a developer?

Yes. What changes is that generated code gets read, tested and reviewed before it's merged.