Maker · Self-hoster · Team lead

Hallur Markvig

I'm the type who builds things himself. At home in Ølstykke I run a small homelab where I host my own systems and make apps my family actually uses — a math helper for my daughter, a shopping list we share, a house number that changes with the seasons. I tinker with electronics and 3D printing and keep an eye on solar, battery and the EV in Home Assistant. By day I work as a team lead in hardware, IoT and systems integration — the same urge to make things click, just at a larger scale and with a team around me.

📍 Ølstykke, Denmark

Hallur Markvig

A bit about me

I've always been happiest understanding how things work — and preferably building them myself. It started with electronics, and since then a homelab has been added: a Proxmox server, a NAS and a handful of self-built applications in Docker. I don't build apps to learn a framework; I build them because there's a concrete everyday problem that needs solving.

Most of my projects are made for my own household. My daughter is in upper-secondary and has ADD, so I built a math helper that explains one step at a time and never gives the answer. We ran out of milk too often, so the shopping list learned to ”guess” what we're missing. And the house number on the wall changes its graphics with the season, because — well, why not.

I like passing things on — I've taught kids microcontrollers and 3D printing at Coding Pirates, and I've sat on the board of the local softball club. And I follow the house closely: solar, battery, EV charging and more all get logged in Home Assistant, and some of those numbers you can see live further down the page.

At work it's the same interest, just with data towers, camera systems and device fleets instead of LED panels and shopping lists. I lead a small specialist team in hardware and IoT, handle the systems integration between equipment and platforms, and still build the tools myself when it makes sense — device dashboards for proactive monitoring came about in exactly the same way as my personal projects.

Live from my homelab

Data fetched directly from my Home Assistant when the page loads.

Home Assistant
Outdoor temperature
Solar production
Power draw now
Battery (home)

Fetching live data …

Projects from my homelab

Alongside work, I run my own homelab — a Proxmox server, NAS, Home Assistant, and a handful of self-built applications I use every day.

ElektronikDBWeb app · Inventory · AI image recognition

ElektronikDB

My own electronics inventory: 334 components and 4,643 units, catalogued by snapping photos with my phone. I pick the category, and an AI suggests name and specs from the images — but nothing is ever saved without my approval.

Read more →
ToDayPersonal dashboard · PWA

ToDay

One combined daily overview: weather, calendar, unread mail and DR news — each an independent widget, so the dashboard still works if one source is down.

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Homelab DashboardObservability · Operations

Homelab Dashboard

Real-time overview of the whole homelab — Proxmox hosts, NAS, LXC/VMs and every Docker container — pulled from four different APIs onto one page that refreshes itself every 30 seconds.

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House NumberIoT · ESP32 · LED panel

House Number

Our house number is a 64×64 LED panel that can change animation for the season or occasion — controlled wirelessly over MQTT from a web app, without ever reflashing the firmware on the wall.

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MathTutorAI learning tool · PWA

MathTutor

A math helper built specifically for my daughter, who has ADD. She photographs or draws a problem, and an AI explains one step at a time — it's built so it can't give the final answer at all.

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Shopping ListWeb app · Realtime · PWA

Shopping List

A shared shopping list for the family that syncs in real time across phones, auto-categorises items with AI, and predicts what we're about to run out of.

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Headache DiaryWeb app · Monitoring

Headache Diary

A private headache diary that logs attacks, symptoms and medication, tracks dosage limits in real time, and can generate a PDF report for the doctor.

Read more →

Behind the scenes

The infrastructure runs on Proxmox with LXC containers for Home Assistant, MQTT, MariaDB and Node-RED, plus a dedicated Docker host for all the applications — tied together behind Nginx Proxy Manager. Everything is monitored, and the setup has run without downtime for weeks at a time.

Volunteering

Board member (marketing)

Egedal Softball Club2023 – present

Website and social media content.

Chairman and co-founder

Egedal Photo Club2015 – 2025

40+ club nights, competitions, newsletter and social media.

Instructor

Coding Pirates2018 – 2021

Microcontrollers, coding and 3D printing for children and teenagers.

Work experience

Hardware Team Lead

SiteHubAug 2025 – present
  • Responsible for all technical equipment on construction sites: data towers, IoT boxes, routers, Axis cameras, info screens, truck scales and face-recognition turnstiles.
  • Testing and assembling complex setups — including ANPR camera systems and access control.
  • Internal tool development with vibe coding and Claude Code — device dashboards for proactive uptime and connectivity monitoring.
  • Systems integration, 2nd-level support and technical documentation for consistent field rollouts.

Electronics Inspection & Warehouse

Emporium PartnersOct 2024 – Jun 2025
  • Inspection, documentation and packing of electronic components (LTS and excess) for industrial customers.
  • Optimised the company website — significantly improved SEO score and Google indexing.

Independent Consultant

by Markvig2013 – May 2024
  • 11 years self-employed, focused on project management, IT infrastructure and digital communication for SMEs.
  • Project coordinator on website projects including server migrations and new visual identities.
  • SEO, performance and Google Analytics for businesses with up to 400 subpages.

IT Manager (CTO)

Dansk SkolefotoJan 2005 – Nov 2013
  • Ran MS Server 2003/2008, 10 servers, close to 100 Windows PCs and QNAP NAS (24 TB).
  • Implemented Google Workspace and IP telephony — improved collaboration and customer service efficiency.
  • Upgraded all locations to fiber connections (200 Mbit).

IT Consultant & Buyer

Amager Electronic2003 – 2005
  • Sales, purchasing, business/wholesale customer service, web development and daily management.

Systems Consultant

Sygeforsikringen "danmark"2000 – 2003
  • Support and project management in a mainframe environment; user training and test materials.

Contact

Got a question, a project, or just want to talk tech? Feel free to reach out.

Send an email — hallur@markvig.dk