Stefan Bayer
IT Manager & Project Lead – insurance and logistics IT, team leadership, data integration, DevOps, IT regulation (DORA)
Most recently IT Team Manager Germany at Markel Insurance SE (04/2025 – 07/2026).
- Led the DORA implementation for Markel Europe
- Built a European IT team across three countries
- Migrated the German systems to the Azure cloud
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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 timelineWith little effort, nothing can be achieved.
From the notebook
This is where I collect topics and notes that keep me busy – from regulation, security and DevOps to practical everyday tools.
Selected
What could possibly go wrong?
An old switch, new code that wasn't rolled out everywhere – why deployments have to be automated.
It's the solution to a problem
A talk by Tom Gaynor, CEO of Markel Group, with plenty of interesting insights.
Latest
officemcp: Any mailbox and any cloud for AI assistants
A new service connects email mailboxes and cloud storage from any provider to Claude, ChatGPT and other AI assistants. Available now as a beta.
Keeping Nextcloud and a file server in sync automatically
A shell script that keeps a local file server and a hosted Nextcloud in sync unattended, with built-in safeguards, notifications and a separate archive.
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.
Notiz – Installation VPN
OpenVPN with NordVPN on a Raspberry Pi – also works on other Linux systems.