Alexander Janzen · IT infrastructure
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About me

Technology I still understand at night.

I come from hands-on work: an apprenticeship in a tax office, support and data centre at a service provider, today consulting for the point-of-sale systems of a large retail group. Alongside that I run my own network — where I try out everything I need professionally.

How I work

Systematic instead of hectic

For me a fault is a question of narrowing down: what works, what does not, and which change in between caused it? I rebuild the case instead of guessing.

Documentation as part of the job

Solutions that are not written down are lost again next time. I write as I go: test setups, findings, decisions — for colleagues and for myself.

Changes with a way back

Before every intervention on a live system: a backup, a clear goal, a check afterwards. "It works again" only counts once I have measured it.

Learning by doing

I understand new technology best when I run it myself — from the hypervisor through to containers and automation. That is why there is a small data centre at my home.

My own lab

The best place to try things out is a system that hurts nobody if it breaks. So privately I run a virtualisation host with several containers and virtual machines, my own network segment with its own DNS, a NAS with a backup concept, and monitoring that alerts me before I notice anything.

What I build there comes back professionally: access paths with identity verification instead of open ports, automation for routine tasks, monitoring with clear thresholds, and backups whose recovery I have genuinely tested.

Details: Projects · Technology: Skills

Personal

Based in
Hamburg
Languages
German, English, Russian (basic)
Qualification
IT management assistant (IHK, 2022)
Balance
3D printing, network and automation projects

Outside work

I read a lot and build too much: besides IT there is 3D printing and everything that can be repaired instead of replaced. Quiet, honest work on a problem — that is what drives me, professionally and privately.