Stefan Bayer
Computer science, management, technology and more
This is where I collect topics and notes that keep me busy – from regulation, security and DevOps to practical everyday tools. My personal notebook.

Recently written
Newest first
It's the solution to a problem
A talk by Tom Gaynor, CEO of Markel Group, with plenty of interesting insights.
NextCloud: Setup unter Android
A simple setup for using NextCloud on several mobile devices.
Von Schlüsseln und Zertifikaten
Of keys and certificates: an overview of using them correctly in software architecture.
What could possibly go wrong?
An old switch, new code that wasn't rolled out everywhere – why deployments have to be automated.
Notiz – Installation VPN
OpenVPN with NordVPN on a Raspberry Pi – also works on other Linux systems.
SOLID – Prinzipien objektorientierten Designs
Five principles intended to lead to good object-oriented design.
It all started with a book about BASIC
That turned into some thirty years in IT – as a developer, tester, project manager and most recently as an IT manager – across a wide range of industries (and places of residence).
Until 2022 I worked as a freelancer under the name “ByTek – Stefan Bayer”; the website from back then is archived.
Career timeline (in German)