Vibe coding cleanup is the work of turning an app built with AI tools into production-ready software. A senior engineer reviews the AI-generated code, fixes security and data-access issues, adds tests and CI/CD, and restructures the parts that block growth. The goal is to keep what works and make it safe to scale.
AI Codebase Rescue
Vibe Coding Cleanup for AI-Built Apps
You built it fast with Lovable, Bolt, Cursor or Claude Code, and it works. Then real users arrived, and every change started breaking something else. Our senior engineers clean up AI-generated code, close the security gaps and add the tests your app is missing, so you can keep shipping without a full rewrite.
Peppernode always rises to the challenge. There are often delays when working with other developers, whereas Peppernode delivers ahead of time while helping us course-correct if necessary.
Sounds familiar?
AI got you 80% of the way. The last 20%, the part that keeps data safe and the system standing, is where vibe-coded apps quietly break.
“It works, but we’re scared to touch it.”
Every fix breaks something else. There are no tests, no clear structure, and nobody fully understands the code the AI wrote.
“A user saw data that wasn’t theirs.”
Access control looks fine in the demo and falls apart the moment someone changes an ID in a request.
“Each new feature takes longer than the last.”
Business logic, database calls and UI are tangled together, so every addition means touching everything.
“We’re thinking about starting over.”
A rewrite feels safer than fixing what’s there. Usually it isn’t: it costs months and throws away what already works.
None of this means starting from scratch
Most vibe-coded apps don’t need a rewrite. They need a senior engineer to find what’s fragile, fix what’s dangerous and put a safety net under the rest.
What we find in vibe-coded apps
These aren’t one client’s mistakes. They’re the security risks and technical debt we see again and again in AI-generated code.
Access control that only guards the front door
Login works, so the app looks secure. But object-level checks are missing on the API, or row-level security is switched off in the database, and one user can read another user’s data.
API keys and secrets in the wrong place
Keys are hard-coded in the repo, left in git history or shipped inside the frontend bundle, where anyone can read them. One leaked key can cost more than the whole build.
No real input validation
User input goes straight into queries and business logic. The AI wrote the happy path and stopped, so bad data, injections and crashes are waiting for the first unusual request.
Payments that only work in the demo
Unverified webhooks, missing retries and subscription logic that breaks on refunds or failed cards. These bugs cost money every day they stay live.
Architecture with no boundaries
Everything talks to everything. It runs, until you need to test it, scale it or hand it to a second developer.
No tests, no CI/CD, no monitoring
Nothing catches regressions, deploys are manual, and when something breaks in production, you hear about it from your users.
Our vibe coding cleanup services
Everything it takes to turn an AI-built prototype into a product you can run a business on.
Vibe Code Audit
A full review of your AI-generated code, infrastructure and setup. You get a prioritized report: what’s critical, what’s risky and what it takes to fix each item.
Security Hardening
We close access-control gaps, move secrets server-side, add input validation and fix authentication, so your users’ data stays theirs.
Refactoring and Architecture
We untangle the code into clear modules, step by step, without stopping your product. It’s the same approach we use in software modernization.
Test Coverage and QA
Automated tests for the critical paths first, then wider coverage. Our software testing and test automation teams do this every day.
CI/CD and Monitoring
Automated deploys, separate staging and production, error tracking and alerts, so releases stop being stressful.
Ongoing Development
Once the core is stable, we can keep building with you, or hand everything over with documentation so your team can take it from there.
Clean up or rebuild?
We’ll tell you honestly which one you need. Most of the time, it’s a cleanup.
A cleanup is enough when:
- The product works and users rely on it
- The data model is mostly right, even if the code around it is messy
- The problems are in security, structure and testing, not in what the app does
- You need to keep shipping while things get fixed
A rebuild makes sense when:
- The core logic doesn’t match how your business actually works
- The stack can’t support where the product is going
- Fixing it would mean touching nearly every file anyway
- There are few users and little data to migrate
Vibe coding security checklist
Tick the ones that apply. Three or more, and your production risk is higher than it looks.
- Most of the code was generated by AI, and no senior engineer has reviewed it.
- You’re not sure where your API keys and secrets actually live.
- Deploys are manual, and rollbacks are improvised.
- Adding features keeps getting slower.
- Nobody has tested whether one user can access another user’s data.
- There are few or no automated tests.
- You’ve had at least one “how did that happen?” data bug.
- Only one person understands the codebase, or no one does.
Tools we clean up after
We work with code from any AI app builder or coding assistant, and with the stacks they usually produce.
- AI app builders
- AI coding assistants
- Common backends
- Our stack
AI app builders
-
Lovable
-
Bolt.new
-
v0
-
Replit
AI coding assistants
-
Cursor
-
Claude Code
-
GitHub Copilot
-
Windsurf
Common backends
-
Supabase
-
Firebase
-
Vercel
-
Stripe
Our stack
-
Python
-
Django
-
FastAPI
-
Node.js
-
Nest.js
-
React.js
-
Next.js
-
React Native
-
Flutter
-
Playwright
Case study
From “scared to touch it”
to safe to scale
Seed-stage B2B SaaS, United States. Built with Lovable and Supabase by a founder and one developer.
Before
- Row-level security was off on key tables, so one customer’s records could be read through the API
- The database service key was shipped in the frontend bundle
- Stripe webhooks weren’t verified, and failed payments left accounts active
- There were no automated tests, and the roadmap was frozen because every release broke something
After:
- Row-level security and server-side permission checks on every table
- Secrets moved server-side and rotated
- Verified webhooks and a tested billing flow
- 140+ automated tests and CI/CD with a staging environment
16
critical and high-risk issues fixed
4
weeks from audit to stable release
0
rewrites needed
Why teams bring their AI-built apps to Peppernode
Senior engineers, not more prompts
We bring the skills AI can’t supply on its own: access control, data safety, system design and careful code review.
QA is part of what we do
Software testing and test automation are core services for us, so your cleanup comes with a real safety net.
We fix before we rewrite
We modernize systems step by step while they keep running. A rewrite is the last resort, not the default.
We use AI ourselves
Our team works with AI tools every day (see AI-assisted software development), so we know exactly where they cut corners and how to close the gaps.
By numbers
2021
Year
of foundation
of foundation
31
Projects delivered
15+
Countries covered
3M+
Software
end-users
end-users
What our clients
say about working with us
5.0
14 verified reviews
Verified
Peppernode proved two React JS frontend developers to improve the UI/UX of a software development company’s platform. This involved implementing new features based on the client’s design specifications.
Verified
Peppernode was hired by a restaurant-focused SaaS company to develop a Django-based web app from scratch using Next and React, and utilized AWS as their main cloud-hosting platform.
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A software company hired peppernode to provide software development services. They automate the client’s workflow through a custom software and help analyze the data they get from it.
Let’s talk about your AI-built app
Book an intro call. Tell us what you’ve built and what’s breaking, and we’ll suggest the next step for your app.
Reach out for a free consultation and a quote
Don’t hesitate – turn your idea into a successful product!
Fill out the form, and we will get in touch with you within 24 hours.
FAQs
Only if it truly needs it, and most vibe-coded apps don’t. The audit ends with an honest clean-up-or-rebuild recommendation, and most projects keep the bulk of the existing code.
It depends on the size of the codebase and what the audit finds. We start with an intro call to understand your app and what you need. The audit has a fixed price, and every cleanup sprint is scoped and priced before we start, so there’s no open-ended hourly bill.
An audit usually takes about a week. Critical security fixes often take one to two weeks after that, and a full cleanup with tests and CI/CD typically takes three to six weeks, depending on the app.
Any of them. We regularly see apps built with Lovable, Bolt.new, v0, Replit, Cursor, Claude Code and GitHub Copilot, often on Supabase or Firebase. What matters is the code and the infrastructure, not the tool that generated them.
A freelancer can fix individual bugs. A real cleanup usually needs security, architecture and QA skills at the same time, which is why we work as a small senior team and own the result end to end.
Yes. We’ll leave you with tests, CI/CD and a clear structure, so AI-generated changes get caught before they reach users. We can also set up review rules for your team.
Yes, where it helps: reading large codebases, drafting tests, routine refactoring. Every change is still reviewed and owned by a senior engineer.
We’re happy to sign an NDA before we see any code. You keep full ownership of your code and data throughout the project.