Hey, I'm Simon

Software engineer in Germany. I tinker with Linux, networking, home automation, and embedded systems — and write about what I figure out along the way.

GitHub Bluesky

Open Source

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hetzner-radar

Tracks the Hetzner server auction in real-time, helping you snag deals on dedicated hardware.

TypeScript

plundrio

Makes put.io work seamlessly with Sonarr/Radarr by speaking Transmission's RPC protocol.

Go

cowboy-ha

Brings Cowboy e-bike stats into Home Assistant — battery, range, trip data, and more.

Python

Recent Posts

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Mar 11, 2026

Adding DNS-over-QUIC to Blocky for Faster Encrypted DNS

I implemented DoQ upstream support in Blocky and cut encrypted DNS latency from 20ms to 4ms on my homelab.

dnshomelabnixosgoopen-source

Mar 8, 2026

Adding machinectl support to microvm.nix

I wanted the microvm.nix VMs on my homelab server to show up in machinectl and to be easy to SSH into over VSOCK. systemd 259 finally added the machined API needed to register richer VM metadata.

nixmicrovmsystemdvirtualizationhomelabopen-source

Mar 4, 2026

Why curl can't reach example.com anymore

Debugging TLS failures in a NixOS microvm that turned out to be a system-wide Cloudflare certificate chain issue.

tlsnixoscurlcloudflarecertificates