Stefan Grothkopp · CTO & AI Coach
grothkopp.com/vibecoding

Your vibe-coded app works.
Now make it bulletproof.

You built something amazing with Claude, Cursor, or Lovable. But you're wondering if it's secure, scalable, and ready for what comes next. I help non-technical founders and vibe coders turn their AI-built MVPs into production-ready software. With 20 years of CTO experience and a genuine love for vibe coding.

Get VibeCheck (free) → Book a code review →
Sound familiar?

You built something amazing. But you're not sure you can trust it.

You used AI tools to build an app that actually works. Maybe you're even making money. But there's this nagging voice in the back of your head:

🔓
Is my app secure? Could someone hack it or steal user data?
📋
Am I GDPR compliant? What happens if someone asks about their data?
📈
Can this thing scale if it actually takes off?
🧩
What happens when I need to change something and I don't fully understand the code?
👤
Should I hire a developer? When? How do I even evaluate one?

You're not alone. Most vibe coders have never been traditional programmers. They're building real products with real users. And most of them have no idea where the landmines are.

How I help

A CTO in your corner.

I won't rewrite your code. I won't talk down to you. I'll show you exactly what needs fixing, explain why it matters, and help you fix it.

Self-service · Free

VibeCheck

Open-source audit tool you install in your coding agent. Run /vibecheck-audit and get a complete security and architecture report for your project.

  • Security, auth, data model, tests, deployment
  • Issues ranked by severity
  • Plain-language explanations (no jargon)
  • Proposed fixes you can apply yourself
Get VibeCheck on GitHub →
Hands-on · 2.500–5.000 EUR

Code Review Workshop

I personally audit your codebase, walk you through every finding, and help you fix the critical issues. Two days, hands-on, at your pace.

  • Complete security and architecture audit
  • Live walkthrough of all findings
  • Priority fix list with your team
  • 90-day roadmap for production readiness
  • Follow-up call after 2 weeks

Perfect for startups with a working MVP that's getting real users.

Book a free 30-min call →
Community · Coming soon

Vibe Coder Community

Monthly live sessions, Q&A, code reviews, and a library of templates and checklists. Connect with other vibe coders who take quality seriously.

Join the waitlist →
Real results

What happens when a CTO looks at your code.

Stefan audited our vibe-coded MVP and found 23 issues we didn't know existed. Three of them were critical security vulnerabilities. He explained everything so we could actually understand it and fix it ourselves.
Founder · AI-built SaaS startup
About me

I vibe code too. The difference: I know where the risks are.

I'm Stefan Grothkopp. I've been a CTO and software engineer for over 20 years. I built and scaled a SaaS platform to 1,500+ customers and over 200 million EUR in transactions. These days I build side projects with Claude Code every week.

I'm not going to judge your messy code. You built something that works, and that's impressive. I'm here to help you understand the risks and fix the ones that matter, so you can keep building with confidence.

20+
Years as CTO & engineer
200M+
EUR transactions processed
1,500+
Customers on SaaS platform
1
Successful exit (Altruja)

Running a software team?

I also coach CTOs and founders on building Agentic Teams. If you're leading engineers, not just building solo, check out my AI Consulting services.

AI Consulting →
FAQ

Good questions.

I'm not a developer. Will I understand what you're telling me? +
Yes. Everything is explained in plain language. No jargon, no condescension. If you don't understand something, that's my failure, not yours.
Will you judge me for my messy code? +
Your code works. That's already impressive. I'm not here to judge. I'm here to help you make it better and more secure.
Do I need to hire a developer after this? +
Not necessarily. Many issues can be fixed with AI tools and the right guidance. I'll tell you honestly when you've reached the point where a human developer makes sense.
How is this different from asking ChatGPT to review my code? +
ChatGPT doesn't know your business context, your users, your data sensitivity, or your scaling plans. I bring 20 years of engineering experience and ask the questions that AI tools don't know to ask.
What tools and frameworks do you support? +
Anything AI-generated. If you built it with Claude, Cursor, Lovable, Bolt, v0, Replit, or any other AI coding tool, I can review it. Most vibe-coded apps use React, Next.js, Supabase, or similar stacks, and those are right in my wheelhouse.
Let's talk

Ready to make your app production-ready?

30 minutes. No pitch, no pressure. Just an honest conversation about where your app stands and what you should fix first.

Book a free 30-min call →
Or write directly: stefan@grothkopp.com