AI Client System

I built this whole thing myself. Now I'll teach you to do the same.

Website, quiz, email automation, CRM integration, payment gateway, I built all of it myself with AI, no developer, by trial and error. This course is the shortcut, so you don't have to walk that same road from scratch. At a few hours a day, you'll have your own working system within two weeks, exactly like the one I run now.

I want to build it too →

11Modules

51Lessons

~2 weeksTo a working system

Karel Petroš

I built this system myself, now I'll teach you to do the same

What changes for you

You're not just buying a guide to one specific website. You're buying a skill you'll use again and again, on whatever you want to build next.

🛠️

You'll stop paying agencies

A website, an app, or an automation an agency would take weeks and thousands of dollars for, you'll build yourself, for a fraction of the time and cost.

🧠

You'll master AI in practice, not just theory

You'll stop just reading about what AI can do. You'll know how to direct it so it produces a real, working result.

🚀

You'll have a live, deployed system

Not five more unfinished ideas in a drawer. One complete system that actually runs and collects contacts.

💬

You won't be doing this alone

Whenever you get stuck, you message me directly, live. More on this in a moment.

Sound familiar?

Today you see AI implementation presented everywhere. Almost nobody shows how to actually deploy it, start to finish.

You watch dozens of videos and posts about everything AI can do, but none of them show the whole process, just fragments.
You've tried Claude or a similar tool on one app, but don't know how to turn that into a whole connected system that actually runs live.
An agency wants thousands of dollars and weeks of waiting for a website or app, something you could do yourself in a fraction of the time.
You don't want to spend dozens of hours on trial and error, exactly what I had to do before it all worked.

Who's behind this, and who you'll be talking to in the course

Karel Petroš

Ten years in B2B sales, six years in marketing, including international markets. I was interim CMO for a fast-growing education company, where I took over the full marketing operation. In recent years I've been building custom apps and systems for companies, with AI, with no team of developers.

This course isn't a lecture from someone who just writes about AI. It's the exact process from someone who built the system you're learning, and uses it himself every day.

And when you get stuck in the course: You message me directly, live, through the chat on the site, personally, the founder who built this system. I usually reply within 24 hours.

What you actually get

Eleven modules, built in exactly the order I built this myself.

Module 0

Why this works

The psychology of personalization and the whole system architecture on one screen.

Module 1

Building a website with AI

How to write prompts Claude actually understands, using a live example from a real project.

Module 2

Designing a quiz that converts

Archetypes, scoring axes, and questions that don't annoy people.

Module 3

CRM integration and automation

Brevo API, serverless functions, key security, no backend developer needed.

Module 4

Emails that don't sound like spam

A personal tone, name personalization, branding, when to automate and when not to.

Module 5

A real case study as proof

How to turn a project into a convincing story, including anonymizing the client.

Module 6

A newsletter system

A structure you can repeat every week, and how to write so it doesn't sound like AI.

Module 7

Deployment, SEO, analytics

Vercel, Search Console, Bing, Tag Manager, cookie consent in practice.

Module 8

Legal basics

Module 9

What's next, once it's running

How to keep tuning what you've already built. You'll have a link to a free consultation, where we'll talk through your next steps, what exactly you're building, in what industry, targeting which customer, and what makes the most sense as an approach.

Module 10

Payment gateway (Stripe)

An extra bonus if you ever want to sell something directly through your system. How to set up a payment link with no custom code and connect it to the whole workflow.

Bonus module: the complete source code for the whole system, the website, serverless functions, email templates, and the case study PDF template. Download it and adapt it for your own business, you're not starting from zero.

This isn't theory

Two real cases from practice, showing that this approach to AI implementation actually works, not just on paper.

B2B service company, 20 people

Task approval between the office and field technicians ran through email threads and a shared spreadsheet that was almost always out of date, everyone kept their own copy. I built the app with Claude Code in three weeks last fall, instead of the usual two to three months at an agency, connected to their CRM, with a separate login for each technician. The owner told me in December, a few months into live use, that for the first time he didn't have to go chasing who'd finished what, he could just see it in one place.

Interim CMO, education company, 30 people

Before I moved fully into building AI-based systems, I spent three months as interim CMO at an education company growing faster than its marketing could keep up. No process, campaigns run from memory, reporting once in a blue moon. I built the full sales funnel from first contact to payment, email automation in Brevo, and a weekly report into one dashboard the leadership team could open themselves, no waiting on me. Three months after I left, the company was still running on that same setup, without me.

One-time payment, lifetime access

$97

11 modules, 51 lessons, ~22 h of contentworth ~$280similar courses run $90–120 for 6–8 h
Complete source code for the whole systemworth ~$15010+ hours of setup, debugging and testing, done for you
Live chat with me personally, all through the coursenot sold separately
Free consultation once you're doneworth ~$70typical rate: $70–165/h
Total value~$500
You pay today$97

Access right after payment, for life, including future content updates.

I want access to the course →

🛡️ 30-day money-back guarantee. Not getting any value out of it? Email me within 30 days of purchase, I'll refund you, no questions asked.

Payment via Stripe, secure, with no card details stored on our side.

Frequently asked questions

Do I need to know how to code?

No. The whole course is built around AI writing the code for you, you just direct it. If you can send an email and copy-paste text, you can do this.

How much time will this take me?

The lessons themselves, reading and writing prompts, take about 20 to 22 hours. But realistically, add time for waiting (DNS propagation, testing emails) and for your own decisions (which archetypes, what tone). At a few hours a day, that usually means two weeks, not a weekend.

What if I can't manage it on my own?

After buying the course, you can book a free call where we'll talk through exactly where you're stuck, and whether hands-on guidance with implementation makes sense.

What if it just doesn't work out for me?

You have 30 days to find out whether it's worth it. If not, email me at karel@karelpetros.com, I'll refund you, no lengthy explanation needed, no questions asked.

What tools will I need?

Claude, Vercel, and Brevo. Most of it has a free tier that's plenty to start with, exact costs are laid out in the first module.

Will it also teach me how to bring in customers?

No, and deliberately so. This course is about building a working system. Bringing people to it is a separate topic, one that makes more sense in a consultation or 1:1, not crammed into the last module.

Is this priced fairly, not too cheap or too much?

Comparable AI and vibe-coding courses in the Czech market sell for roughly $90 to $120, usually for 6 to 8 hours of video. This course has over 20 hours of content, the complete source code, and live chat with me throughout, for $97. I didn't pick the price out of thin air, I checked it against real courses on the market.