01
2015
Teaching my three-year-old programming with Lego
A small experiment in shapes, constraints, and problem solving.
George Hadjivarnava · Cyprus
I make things.
Then I try to make them last.
I build products, software, and teams. I have also made things by hand since childhood.
A little more about meWriting since 2012
Still building
01 / About
The work changed.
The habit did not.
I have been making things since childhood. I started woodworking when I was five.
I am an engineer at heart. I like simple, unconventional solutions and rules that can be explained without hiding behind more rules.
At Foody, Delivery Hero, Moving Doors, and Terra, I worked on products, systems, and teams. The useful part is what keeps working when one person, including me, steps away.
02 / From the archive
Things I wrote
while making things.
Teaching programming with Lego, learning how to work, and building a Raspberry Pi case from pieces already on the table.
03 / Companies
What happened
after the early posts.
I wrote these pieces in 2026 about Foody, Delivery Hero, Moving Doors, and Terra. They cover what we built and what changed.
01
2019 to 2026
Learning scale at Delivery Hero
What I had to change when Foody's local engineering work became part of Delivery Hero.
02
2022 to 2025
Opening Moving Doors
Why I moved from advising Staycaee to building it as technical co-founder before it became Moving Doors.
03
2026 to now
Terra now
What I am working on now at Terra: health data infrastructure, engineering, and interfaces for AI agents.
04 / Playground
Experiments,
with no good excuse.
Things I make because I am curious, because they are fun, or because I want somewhere to put a shameless plug. Sometimes all three.
05 / Contact
Find me
elsewhere.
The simplest way to get in touch is through one of these public profiles.
