Karl Querel — Software Engineer
01 · Work
How I got here
- 2003
Education 2003 – 2010
French Baccalauréat in Economics
Grand Lycée Franco-LibanaisBeirut, LebanonGrew up in Beirut, in the French school system.
- 2010
Education 2010 – 2013
Bachelor of Business Administration
University of Geneva (HEC)Geneva, SwitzerlandLeft Lebanon at 17 to start my studies in Europe.
- 2013
Education 2013 – 2015
Bachelor in International Business
Grenoble École de ManagementGrenoble, FranceA second bachelor, this time in the French Alps.
- 2015
Education 2015 – 2017
Master in Finance
Grenoble École de ManagementGrenoble, FranceCorporate finance and derivatives.
- 2017
Experience 2017 – 2018
Sales Associate
Cedar EuropeMadrid, SpainMoved to Madrid: logistics and petrochemical sales.
- 2018
Experience 2018 – 2022
Commodity Broker
Cedar EuropeParis, FranceTraded gold, oil, and petrochemicals across EMEA.
Career pivot
2022Education 2022 – 2025
Software Engineering
42 ParisParis, FranceRebooted from scratch. Deep dive into C and Unix.
- 2025Now
Experience 2025 – Now
Software Engineer
ZetraParis, FranceBuilding the software behind EV charging and renewable energy.
02 · Life
Off the clock
ABOUT ME
I come from a multicultural background.
Born in France to a Lebanese mother, I spent my teenage years in Lebanon before coming back to Europe.
I have been moving around ever since. The countries changed, but what I do with my free time didn't.
DOGS
I always loved animals, especially dogs.
I adopted my first one, Lesko, from the streets of Grenoble while I was still a student. He was aggressive towards other dogs, and it took us two full years of discipline and hard work to heal his traumas. I learned everything I know about dogs training him.
Two years later, in Lebanon, he ate rat poison and died shortly after. His sudden and brutal death shattered me… I was lost, confused, and angry.
Less than a week later, fate handed me baby Yako. He was three weeks old, not even weaned. I couldn't grasp the idea of adopting another dog, let alone be ready for it. But Yako taught me that life goes on, no matter what.
For almost a decade now I've dog-sat in my free time, and Yako has seen a lot of dogs come through his home.
To me, a home isn't a home without an animal. And dogs hold the values that speak to me most: loyalty, playfulness, and living in the present (alongside a bottomless stomach).
SPORTS
Staying active is my favorite way to clear my head.
I practiced Filipino martial arts for five years and ran regularly until my right knee politely asked me to stop. For a while, I was hooked on bouldering and lead climbing.
Nowadays, I keep things grounded by hitting the gym four times a week. But whenever I can, you'll find me outdoors at the beach, mostly trying to convince myself that I know what I'm doing on a surfboard.
MUSIC
I've been playing the guitar since I was eight years old, performing in three different bands during my teenage years in Lebanon.
While that passion eventually faded, I still pick up the instrument whenever inspiration strikes.
VIDEO GAMES
For as long as I can remember, I’ve been fascinated by video games.

My first real dive was Final Fantasy VII, where I was completely amazed by the visuals, music, and story, even if I was too young to fully grasp it all.
Then came our first home PC, and with it Heroes of Might and Magic IV and Age of Mythology. That was the spark.
Years later I got into the amazing but addictive World of Warcraft. I ended up playing it for 13 years, ran a Twitch channel, and led teams of more than 20 players on Discord.
Eventually realizing how much of my life it was consuming, I deleted my account and stepped away entirely.
Today I only dabble in short single-player masterpieces like This War of Mine, Outer Wilds, or Return of the Obra Dinn.
Coding has since replaced that screen obsession, and this time, it gives back as much as I put in.



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