Who I am and what I do

I’m Joris Geessels, Jolos is the pseudonym I use on the net since the age of ~15. I graduated as a computer science engineer from the University of Ghent. As an engineer I’m interested in ‘building stuff’. As a software engineer you do this by means of code. But it’s my belief that building software is often more about ‘engineering’ people than programming a machine. Nevertheless I certainly get excited by solving a technical challenge.

I spend most of my day at Luceda Photonics a company that I co-founded. At Luceda Photonics we build design software for photonics, an emerging high tech market. I think that we’re doing some really exciting things, if you would like to hear more, ask me about it!

Dinghy Sailing

It's wet, it's cold, it's exhausting but everytime when there's a nice breeze, I long to go out sailing.

Sadly it's an expensive sport, so I only do it a few times a year. Almost exclusively at the French sailing school Les glénans where I'm a sailing instructor.

Computer Science

Computer Science & programming is a rapidly changing industry & domain. This makes it interesting, but it's also a challenge to keep up with all the advancements.

Some random keywords (or buzzwords ?) : python, clojure, functional programming, immutability


One of the most intriguing and versatile countries I've visited. I had the chance to do an internship in Tokyo in the summer of 2011. The memories I have from this time and from my travels afterwards are still very vivid. I'll certainly go back, but unfortunately you can't just walk there.

Film & Photography

I really enjoy watching a great movie. To me, a great movie is a movie that makes you think differently about something, and succeeds in telling its story in a visually appealing way.

Reading a book

Reading is something I want to do much more often. In a world where fast-paced consumption of information is the norm, reading a book is more important than ever


A vague and broad term, but the more I realise that the world is a complex thing, the more I get to appreciate the value of simplicity and minimalism