01
2019 to 2026
Learning scale at Delivery Hero
What changes when local product intuition meets the systems and constraints of a global company.
George Hadjivarnava · Cyprus
I build useful things
and the teams behind them.
A technologist, founder, and writer working across products, infrastructure, and the practical work of making teams effective.
A little more about meWriting since 2012
Current chapter: Terra
01 / About
A record of building,
then learning again.
In 2015, I helped start Foody in Cyprus. Foody joined Delivery Hero in 2019, where the next chapter was learning how local product knowledge, systems, and teams change at greater scale.
From 2022 to 2025, I joined Staycaee as a technical co-founder. The company later rebranded to Moving Doors. The role began as advisory work; wanting equity and a more active stake pulled me into the company. In 2026, I am at Terra, working on infrastructure for health products and considering what changes when agents become users too.
02 / Writing now
The current
chapters.
Written in 2026 about the work, companies, and decisions that came after the original blog.
Read article
02
2022 to 2025
Opening Moving Doors
How advising Staycaee led to taking equity and an active technical co-founder role before the company rebranded to Moving Doors.
03
2026 to now
Terra now
How the earlier chapters inform current work on engineering, health data and AI at Terra.
03 / From the archive
Old ideas,
worth revisiting.
The original xatzis.com: notes and projects preserved as they were written between 2012 and 2015.
01
2015
Teaching my three-year-old programming with Lego
A small experiment in shapes, constraints, and problem solving.
02
Read article03
Read article04 / Contact
Find me
elsewhere.
The simplest way to get in touch is through one of these public profiles.
