Development

C++, Web or Embedded? I love to program them all!

Full Stack Developer?

Definitively.

Servers

CI workers, Gameservers - or better systems with Docker & Kubernetes

Virtualize and containerize? Everything.

Hacking

Closed Source microcontrollers? Let's crack and flash!

Paid Open Source? Let's free it!

...and yes - my light runs Linux.

Native Development

C/C++ (♥), Python, Rust, Java or Kotlin - let’s go! My favourite rendering APIs? Vulkan, OpenGL (with GLSL). Librarys? Vulkan SDK, libcurl, GLUT, SDL2 and Dear ImGui. And did you know that I’m the maintainer of Open-Smartwatch?

Web Development

PHP, HTML, CSS, JS and TS - you name it! Libraries and Frameworks? Python Flask or FastAPI (♥) (with Poetry), Angular, Cordova and Electron. Things I know? Well, NodeJS/NPM and NVM.

Development operations

DevOps? Of course! Gitlab CI, GitHub Actions, Docker and Kubernetes: Starting with just some code-format-checks up to tested, scaled, auto-deployed and prodution-ready apps - even this site is part of a CI pipeline!

Systems administration

Linux is my world! I also enjoy working with a lot of other server-related software: Virtualisation (KVM, Docker, Kubernetes), storage (ZFS, NFS), services (Nextcloud, Jellyfin, BookStack and many more) or management (Netdata, Ansible) are only some of my loved tools!

Software engineering

I love to design systems: Starting by just the internal class diagrams of a server instance up to the whole API backend with distributed MicroServices.

Webdesign

You need a website or want to modify an existing one? Wordpress, Joomla and now Hugo - I worked with all of them.

You want the newest posts directly pushed to your desktop or smartphone? Then just add the RSS feed from below!

From my blog

Random encounters with fascinating software and sporadic posts about the world (of tech). Some DIY projects included - refer to their package leaflet for risks and side effects.

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FFmpeg - Conversion

on October 25, 2025 23:00

Some copy-paste scripts for mass media conversion

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WireGuard VPN on a JetKVM

on February 28, 2025 23:42

The setting…

I recently started adopting WireGuard VPN into more and more of my server infrastructure. Consequently, I was wondering if the Linux-based JetKVM could also be integrated into these networks - especially useful since I do not want to use their cloud solution, but still want to deploy these onto remote locations as needed. So, getting WireGuard to run there was both harder and easier than expected - here is a write-up on how to do it. If you just came here to quickly copy-paste some commands, there you go:

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Unbranding a Fritz!Box 6490 KDG Edition

on December 6, 2024 14:12

What was going on?

Recently, I had once again the unique opportunity to flash a “Fritz!Box 6490 KDG Edition” with the guarantee of no consequences in case I completely brick it. This time, because I needed the DECT functionality still working after this operation, I chose to stay on the proprietary firmware by AVM. 🤷‍♂️

So, here is my battle plan:

  1. Get the stock firmware for the device from its vendors download-server with its recovery-tool in case it goes really wrong.
  2. Convince the bootloader to report an unbranded model to the OS (guide from here)
  3. “Recover” and boot it
  4. Enjoy a more open experience!

What really happened…

Obtaining the stock image

This is where I hit the first road-block: The manufacturer offers seemingly no recovery.exe-tool for this device. So, to proceed, I just grabbed the original firmware image from their download server and extracted the partition images from it:

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Phishing Attempt on Steam

on July 20, 2024 18:25

Well, that happened…

…just a word of warning: Be careful on the internet!

I was randomly contacted by some dude on Steam late at night, stating that he wanted me to connect with his buddy - fine, right? While he did not identify himself properly, I shrugged it off, as he just wanted to hook me up with his friend quickly. I was like “Sure, why not?”, let’s give it a shot. Here is a screenshot of our little chat:

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