undefeatedmindset

I'm Marek, a freelance IT consultant, developer and network engineer in Denmark.

I build software, wire up networks, and set them up so you can forget they exist.

Start a project Read the blog

Based in: Denmark --:--
Works: Remote, on-site when it helps
Replies: Usually within a day
Speaks: English, Danish and German

One person, start to finish.

No account managers, no hand-offs, no ticket ping-pong. You talk to the person doing the work.

Rack to release
I handle the hardware, the network and the code myself, so nothing falls between teams.
Plain language
Straight answers, not jargon. If something is a bad idea, you hear it before you pay for it.
Documented work
Everything I set up comes with notes, so whoever comes next knows what's there and why.

Infrastructure that stays up, software that ships.

From the switch in the cupboard to the code running on top of it. Six ways I can help, end to end.

Network engineering

Office and site networks that stay up.

Firewalls & security

FortiGate and pfSense, tightened and documented.

Windows Server & Microsoft 365

Identity and email, set up once and left clear.

Cloud & infrastructure

Azure, AWS and Google Cloud without the sprawl.

Web & software development

From fast websites to backends that hold under load.

Second opinions

An outside look before you commit.

How we work together.

Four steps, no surprises. You always know what happens next and what it costs.

Step 1: You tell me what's wrong
What's broken, or what you want built. A call or an email is enough. No pitch, and you owe nothing.
Step 2: I read the setup first
The network, the servers, the code: I look at what you already run before I suggest a thing.
Step 3: A plan with a fixed price
In writing and in plain language, with the cost fixed before any work starts.
Step 4: Built, tested, written down
I do the work, test it and hand over the notes. After that it should be boring, in the best way.

Cybersecurity, from both sides.

I take systems apart in my own lab, then build networks and code that are hard to break. You get the result, explained in plain language.

Security engineering
Secure by design, not bolted on. Segmented networks, hardened baselines, least-privilege access and safe defaults, from the first config.
Red teaming
Offensive testing, in a lab or with permission. Active Directory attack paths, privilege escalation and web app testing, so the gaps show up before they become an incident.
Reverse engineering
Malware analysis, static and dynamic. Unpacking samples, watching what they really do in a sandbox, and pulling out the indicators that matter.
Blue teaming
Detect, contain, recover. Detection rules, logging that earns its disk space, and a calm plan for the day something gets through.

A wide kit, on purpose.

Networks, servers, cloud and software. The same person follows the work from the rack to the release.

Web

Sites and interfaces. The part clients and staff actually use.

Next.js
React
Tailwind CSS
GSAP

Languages

The software itself. Services and tools, written for the job.

Rust
Go
TypeScript

Tooling

How it gets built and run. The local toolchain, containers and the host.

Bun
Docker
Linux

Infra

Servers and identity. Machines, accounts and mail.

Windows Server
Microsoft 365
VMware ESXi

Network

The network itself. Switching, routing and the firewall in front.

Cisco
Arista
Juniper
FortiGate
pfSense

Cloud

Where it is hosted. The major clouds, defined as code.

Azure
Google Cloud
Cloudflare
Vercel
AWS
Terraform

Notes from the field.

Fixes and build logs, written close to the problem and clear enough to come back to.

All posts →

grok bot

October 9, 20265 min

My first day with Grok Bot, and why I'm running it through Cursor

Today was my first day with Grok Bot: a main Bot with its own email, a small dev team in a group chat, and a cloud agent that wrote this post.

Read

aim training

October 5, 20263 min

Surpass your limits with the bardOZ method in KovaaK's

I was stuck on the same KovaaK's scores for months. Training static aim the bardOZ way got me moving again, and here's how I ran it.

Read

wifi

September 28, 20264 min

From 300 to 1300 Mbit/s over Wi‑Fi: MLO on a Mercusys MR27BE with Netnørden 2500/2500

My 2500/2500 fibre gave my iPhone Air only 300 Mbit/s over Wi-Fi. Turning on MLO and off AI QoS on a budget Mercusys MR27BE took it to around 1300 Mbit/s.

Read