REACTIVDEVS
Ship production software with AI like a senior. Pay only once.

ONLINE COURSE FOR DEVELOPERS

Ship production software with AI like a senior. Pay only once.

For developers tired of vibe-coding, endless prompt-tinkering and code that falls apart in production. Learn to orchestrate AI, agents and the right patterns and ship faster than ever. A final test and a certificate at the end.

$430$300early-bird price
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Early-bird price held for the waitlist, one-time payment. Sales open once the course is finished.

COURSE STATUS

This course is still in production

The full 11-lesson outline is done, and the materials and videos wait until Production Ready Frontend Developer is finished. Sales open once it's done. Until then you can join the waitlist: you hear the launch date first and I hold the early-bird price for you.

FROM THE FOUNDER

Why this course exists

I've built software for over 12 years and led engineering teams for the last 5. When AI tooling hit, I saw two kinds of people: some shipped three times faster with AI, others drowned in code they didn't understand.

The difference was never who had the smarter model. It was the system: how you delegate work, how you review the output, which patterns and agents you use. I turned that system into a course you can go through in a few hours.

It is not a bag of tricks that expire in a month. It is a way of working that holds across stacks and models. Video wherever it is worth watching me work: I share my screen, write real code and explain the decisions, including the moments the model returns nonsense and we have to back out.

Jakub Kraus, founder of ReactivDevs

PAIN POINTS YOU KNOW

Does any of this sound familiar?

AI generates code you don't understand and you're scared to ship it to production.

How the course fixes it: You'll learn to delegate to AI so you understand the output and can defend it in review.

You spend hours tinkering with prompts and still get inconsistent results.

How the course fixes it: You get ready-made patterns, templates and workflows that produce repeatable output.

Vibe-coding works for the demo but falls apart once the project grows.

How the course fixes it: A spec-driven approach and clean architecture that hold even on large codebases.

You don't know which AI tools and agents to actually use, and for what.

How the course fixes it: We'll cover Claude Code, MCP and agents, and when to reach for each.

You feel AI will replace you before it actually helps you.

How the course fixes it: You become the one who orchestrates AI, not the one it replaces.

10 lessons in five phases plus a free intro lesson, from the prompt to shipping

Let's cover how it works

01

How it works

Phase 1 · What you are actually driving

What really happens when you send a prompt. Context and tokens as behaviour, not definitions, and why a bigger context often means a worse answer. Five myths that slow you down.

Mindset

02

AI Dev Kit

Phase 1 · What you are actually driving

You clone a finished repo with skills, agents, hooks and CLAUDE.md, and we walk through what is in it and why. Tool permissions and why you never allow everything.

Kit

03

Spec and plan

Phase 2 · Brief it and build it

Context instead of a task. How to turn an idea into a spec the model cannot misread, plan mode, and splitting work into steps you can check one by one.

Spec

04

Build with AI

Phase 2 · Brief it and build it

The same feature twice, by hand and with AI, with both times side by side. Then a backend for an existing app from the OpenAPI contract, including the moments the model gets it wrong.

Build

05

Someone else's code

Phase 2 · Brief it and build it

How to get the model into the context of a large project, have it explain code without making things up, and refactor a big file without breaking the rest.

Legacy

06

Quality

Phase 3 · Quality and safety

Code review with AI and what you still have to read yourself. How to spot a test that tests nothing in ten seconds. How to describe a bug so the model does not invent the cause.

Review

07

Safety

Phase 3 · Quality and safety

Three levels of access, what never goes into a prompt, and the places AI gets security wrong again and again: authorisation, input validation, IDOR.

Security

08

Skills and agents

Phase 4 · The real leverage

A skill taken apart line by line, then your own skill for your weekly routine. How an agent differs from a chat, the kit's agents on a real PR, and running several at once.

Agents

09

MCP and hooks

Phase 4 · The real leverage

What MCP is and is not, which servers earn their place and which are just a demo, and your own MCP tool. Hooks for routine work: pre-commit checks, release notes.

MCP

10

Shipping

Phase 5 · Take it to work

AI in a team and shared rules, how to defend the workflow to your lead, estimates when AI changes your speed unevenly, and what to do when the model changes.

Ship

FREE SAMPLE

Look inside before you pay

The full course outline plus excerpts from four lessons: the anatomy of a skill from the AI Dev Kit, agent versus chat, a review checklist for AI generated code, and the same feature by hand versus with AI. 10 pages.

DOWNLOAD THE SAMPLE (PDF)

No email, no signup. Just take it.

VALUE INCLUDED

Everything you get

The complete course, 11 lessons

$350

The AI Dev Kit: a finished repo with skills, agents, hooks and CLAUDE.md

$430

A reference full-stack project, backend included, built with AI

$259

A library of prompt patterns and a feature spec template

$153

A review checklist for AI generated code and three levels of safety

$109

Lifetime access, come back any time, no limits

✓ included

Total value

$1,301

Waitlist price

$300
JOIN THE WAITLIST

Free, no commitment · Early-bird price held · No spam

COMPARISON

AI development: by luck vs. by system

Without the course

You copy code you don't understand

You write prompts from scratch every time

Code falls apart once the project grows

You don't know which tool to use when

Review takes forever and things still slip through

You're afraid AI will replace you

With the course

You understand every line and can defend it

You have patterns and templates on hand

Architecture holds even on large codebases

You know exactly when to use which tool and agent

An AI review pipeline catches bugs for you

You orchestrate AI and ship like a senior

RESULTS FROM 1:1 MENTORING

What the people I mentored say

20+

clients in 1:1 mentoring

100+

1:1 lessons delivered

28

sessions with the longest client

Long

Senior full-stack developer · 16 sessions

Starting point
Broad awareness of new tech, but plenty of it he had never done for real. His company had no process.
What we worked on
A testing strategy from unit tests to E2E in Playwright, GitHub Actions, secret management, clean code and clean architecture, microfrontends, state management. Plus soft skills: negotiating pay, practising 1:1s and conflict situations.
Outcome
A step up to senior level and, above all, confidence. He can defend his decisions and proposed process changes to his own company.

Honza

Mid-level frontend developer · 12 sessions

Starting point
He knew React but lacked confidence. At work they pushed logic onto the frontend through Next.js even where it did not belong.
What we worked on
A mock interview, React deep dives, the Next.js versus Vite and React Query decision, MSW, his own app in a monorepo, pair programming on data fetching, design patterns and TypeScript, preparation for the coding task.
Outcome
A new job as a strong mid-level developer and a significantly better salary.

Martin

Junior React developer · 22 sessions

Starting point
Coming from the jQuery world. Hand-written fetches, almost nothing on authentication, self-taught from tutorials.
What we worked on
React Query and a generated client from Swagger, login and logout through mutations, react-hook-form and Zod, a generic Input via useController, three sessions on git alone, CI/CD and GitHub Actions, testing, Firebase, Next.js, interview preparation.
Outcome
A complete move from jQuery to React, the right tech stack and a real grasp of the principles. A 180-degree turn and a well-paid junior React developer job, even in this market.

Tobiáš

Entry level, moving off Drupal · 10 sessions

Starting point
Drupal, CSS and JavaScript. React from absolute zero.
What we worked on
Starting a project in Vite, hooks and custom hooks, react-hook-form and Zod, his own FormInput component, React Router and layouts, Swagger and Orval, login and logout, pipelines. Plus working with Cursor.
Outcome
He built an app from scratch, got the React fundamentals down and went looking for a more challenging role.

Zuzka

Junior developer, moving off Angular · 6 sessions

Starting point
An Angular background, no React at all. She wanted to stop second-guessing herself and gain confidence.
What we worked on
Getting into React and state, an Angular versus React comparison, interview preparation, Orval and React Query instead of a hand-written client, query keys and invalidation, working with git.
Outcome
Production-ready fundamentals, real confidence and a new job. Genuinely sharp.

THE DECISION

You have two options

You can keep going the way you are, fighting AI that generates code you don't understand and hoping it survives production. Or you learn the system seniors use. The outline is done, production waits until Production Ready Frontend Developer is finished. Join the waitlist so you hear the date first and keep the early-bird price.

$430$300early-bird price
JOIN THE WAITLIST

Free, no commitment · Early-bird price held · No spam

BEFORE YOU DECIDE

Frequently asked questions

The course is fully self-paced, 11 lessons. Video wherever it is worth watching, I share my screen, and you follow along as if you were sitting next to me. The pace is up to you and access is lifetime.