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Achievement: QuickdrawAchievement: StarstruckAchievement: Pull Sharkx2Achievement: Arctic Code Vault Contributor

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xp4u1/README.md 

Paul Hoerenz / Homepage / GitHub / App Store / Google Play

I'm a Cyber Security student and work at ZEISS, keeping digital systems safe. In my free time, I enjoy developing websites and apps. I also mentor at juFORUM, leading workshops for youth groups to share my passion for tech.

If you use my open source projects, consider supporting my work. Thank you!



My Commitment to (Tech) Education

I had to teach myself all my IT skills because I didn't have anyone to support me. Unfortunately, this is the case at many schools in Germany (and the world). I want to help young people who are interested in technology. That's why I'm juFORUM mentor.

I want education to be free. That's why I've published open source projects like Discite that are free in Google Play and the Apple App Store.

My work as a mentor is voluntary and I have to cover the costs for the Apple Developer costs for Discite (€99 per year) myself. Therefore, I am happy about any support, such as GitHub Sponsors or through a purchase of one of my other apps on Google Play or in the App Store like memoria.


Workshops

As part of my role as a juFORUM mentor, I've led workshops focused on technology and software development. If you’d like me to conduct a workshop at your location, please find more information here.

All of my workshop materials are open source, making them freely accessible for anyone to use and adapt.


2025:

  • Zukunftsakademie Heidenheim: Basics of app development
  • Fraunhofer Talent Take Off – Vernetzen: Hack me if you can - Introduction to Cyber Security

2024:

  • Fraunhofer Talent Take Off – Vernetzen: Basics of app development

2023:

  • Fraunhofer Talent Take Off – Vernetzen: Basics of app development
  • juFORUM Mentorenwochenende: Basics of app development

Featured Projects

  • memoria Sleek, minimalist diary with private, secure, self-hosted data.
  • zeroday.pw Self-hosted CTF platform with automated subdomains, isolated challenges, and full data control.
  • App Workshop Custom low-code platform with companion app to teach (app/game) development



Pinned Loading

  1. memoria memoria Public

    Sleek, minimalist diary with private, secure, self-hosted data.

    TypeScript 67 6

  2. zeroday_pw zeroday_pw Public

    Self-hosted CTF platform with automated subdomains, isolated challenges, and full data control.

    TypeScript 1

  3. discite discite Public

    Die smarte App zum Latein Lernen

    TypeScript 4 1

  4. workshop workshop Public

    Mit praktischen Anwendungen Programmieren lernen

    JavaScript