Backend Engineer at trivago. Likes just-in-time compilers and hot chocolate. About me.

Maybe You Don't Need Kubernetes

A woman riding a scooter Illustration created by freepik, Nomad logo by HashiCorp. Kubernetes is the 800-pound gorilla of container orchestration. It powers some of the biggest deployments worldwide, but it comes with a price tag. Especially for smaller team… More »


Rust allows for a lot of syntactic sugar, that makes it a pleasure to write. It is sometimes hard, however, to look behind the curtain and see what the compiler is really doing with our code. More »

The Unreasonable Effectiveness of Excel Macros

I never was a big fan of internships, partially because all the exciting companies were far away from my little village in Bavaria and partially because I was too shy to apply. Only once I applied for an internship in Ireland as part of a school program. Our teacher assigned the jobs and so my friend got one at Apple and I ended up at a medium-sized IT distributor — let's call them PcGo. More »

Switching from a German to a US Keyboard Layout - Is It Worth It?

For the first three decades of my life, I've used a German keyboard layout. A few months ago, I switched to a US layout. This post summarizes my thoughts around the topic. I was looking for a similar article before jumping the gun, but I couldn't find one — so I'll try to fill this gap. Why switch? … More »

fastcat - A Faster `cat` Implementation Using Splice

Lots of people asked me to write another piece about the internals of well-known Unix commands. Well, actually, nobody asked me, but it makes for a good intro. I'm sure you’ve read the previous parts about `yes` and `ls` — they are epic. More »

That Octocat on the Wall

So I'm in a bit of a sentimental mood lately. Github got acquired by Microsoft. While I think the acquisition was well-deserved, I still wish it didn't happen. Let me explain. More »

Ten Years of Vim

When I opened Vim by accident for the first time, I thought it was broken. My keystrokes changed the screen in unpredictable ways, and I wanted to undo things and quit. Needless to say, it was an unpleasant experience. There was something about it though, that kept me coming back and it became my main editor. Fast forward ten years (!) and I still use Vim. Why is that? More »

Refactoring Go Code to Avoid File I/O in Unit Tests

At work today, I refactored some simple Go code to make it more testable. The idea was to avoid file handling in unit tests without mocking or using temporary files by separating data input/output and data manipulation. More »

A Tiny `ls` Clone Written in Rust

In my series of useless Unix tools rewritten in Rust, today I'm going to be covering one of my all-time favorites: ls. First off, let me say that you probably don't want to use this code as a replacement for ls on your local machine (although you could!). As we will find out, ls is actually quite a … More »

Rust in 2018

I wrote about the future of Rust before and it seems like nobody stops me from doing it again! Quite the contrary: this time the Rust core team even asked for it. I'm a bit late to the party, but here are my 2 cents about the priorities for Rust in 2018. More »
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