# Jozef Walterstein — consultant for AI, automation and security

> Freelance consultant with 20+ years in IT. Helps companies deploy AI where it actually saves work, automates processes, and builds and secures the infrastructure it all runs on. Works remotely and onsite; experience across EMEA, North America and Asia-Pacific.

The site is available in Slovak (default), Czech and English. Working style: short iterations and continuous results; delivered solutions are versioned, backed up and reversible, including documentation.

## Languages

- [Slovenčina (default)](https://walterstein.eu/): domovská stránka v slovenčine.
- [Čeština](https://walterstein.eu/cz/): domovská stránka v češtině.
- [English](https://walterstein.eu/en/): homepage in English.

## Pages

- [Home (SK)](https://walterstein.eu/): introduction, services (AI & automation, security, web & infrastructure, scripts for legacy environments), projects and tech stack.
- [Vibe coding courses hub (EN)](https://walterstein.eu/en/courses/): overview of free interactive vibe coding mini-courses. Also in [Slovak](https://walterstein.eu/kurzy/) and [Czech](https://walterstein.eu/cz/kurzy/).
- [Vibecoding with Claude Code (EN)](https://walterstein.eu/en/claude-code-course/): free interactive mini-course on building software by directing AI (Claude Code) — session replays, exercises, quizzes. Also in [Slovak](https://walterstein.eu/claude-code-kurz/) and [Czech](https://walterstein.eu/cz/claude-code-kurz/).
- [Vibecoding with ChatGPT Codex (EN)](https://walterstein.eu/en/chatgpt-codex-course/): free interactive mini-course on delegating tasks to the ChatGPT Codex agent — cloud tasks, task briefs, diffs, AGENTS.md. Also in [Slovak](https://walterstein.eu/chatgpt-codex-kurz/) and [Czech](https://walterstein.eu/cz/chatgpt-codex-kurz/).
- [AI news (EN)](https://walterstein.eu/en/ai-news/): a daily AI digest — new models, tools and announcements with source links, assembled autonomously by an AI agent following the author's curation rules. Also in [Slovak](https://walterstein.eu/ai-novinky/) and [Czech](https://walterstein.eu/cz/ai-novinky/); RSS available at /en/ai-news/rss.xml.
- [Pricing (EN)](https://walterstein.eu/en/pricing): initial consultation €500 (credited toward the project if it goes ahead), standardized projects €2,000 – €8,000, custom long-term work priced by scope.
- [Cenník (SK)](https://walterstein.eu/cennik): slovenská verzia cenníka.
- [Ceník (CZ)](https://walterstein.eu/cz/cenik): česká verze ceníku.

## Services

- [AI & automation](https://walterstein.eu/en/#co-robim): finding time-consuming processes and automating them, agent systems, connecting AI to existing tools, custom scripts.
- [Security](https://walterstein.eu/en/#co-robim): system hardening, security audits, configuration and documentation — years of practice for large international companies.
- [Web & infrastructure](https://walterstein.eu/en/#co-robim): websites and small SaaS from design to deployment including the server, backups, monitoring and automated deploys.
- [Scripts & tools for legacy environments](https://walterstein.eu/en/#co-robim): single-purpose scripts and small tools, fixing and optimizing existing scripts, simple GUIs for repetitive tasks.

## Selected experience

- [Projects](https://walterstein.eu/en/#projekty): 20+ years of server infrastructure management and migration/hardening projects for international companies (EMEA, NA, APAC), a complete website rework for a home wellness and longevity products company, and a fully self-managing multi-tenant VPS (backups, health checks, deploy pipeline).

## Contact

- [E-mail](mailto:jozef@walterstein.eu): reply within three business days.
- [LinkedIn](https://www.linkedin.com/in/jwalterstein/): professional profile.