Jean Wasilewski

  • Electrical and Computer Engineer, PolytechLille
Hi! I’m Jean Wasilewski, a French engineer graduated by the polytechnic university school of Lille (aka PolytechLille). I graduated in microelectronics, automatics and computer science. I am passionate about these subjects and even more by the innovation made by the open source community. As much as possible, I try to contribute to these projects to create a better world together.
Interests: Computer science, electronics, automation, innovation and open source

Professional experiences and projects

Yousign - SRE 2022-07 ~ now
Scaleway - DevOps 4 years - 2018-04 ~ 2022-06
PolytechLille - Teacher 2018-09 ~ now
OVH - Developer 2 years - 2016-04 ~ 2018-04
Worldline - Developer 4 months - 2015-05 ~ 2015-08
萌木の村 The Nest - Waiter 2 months - 2014-07 ~ 2014-08
French National Health Insurance Fund - Developer 2 months - 2012-06 ~ 2012-08

Personal experiences and projects

This website
[code] Creating a website for my CV was a fun task. With Hugo and Firebase, it was done in no time!
A homemade lab with a Ceph cluster
Back when I worked in OVH, I had the opportunity to buy second hand hardware for cheap. I made it evolve to reduce size, power consumption and increase capacity. It went through three generations of upgrades and is now a fully functionnal 32 TB cluster.
French security competition: BreizhCTF 2019 - 5th finalist
[website] [results] [our team before] [our team after] When at Scaleway, we decided to create a small team to pwn CTFs. We named ourselves Scalewelsh, trained and registered to the BreizhCTF. This event was amazingly fun and we were happy to finish 5th.
Audio HiFi amplifier
[repo] When I was a kid, I tried to create a HiFi amplifier. It did not go as expected and I learnt a lot about electronics in the mean time. Now the amplifier works thanks to a STA540 but I plan to change for a higher quality chip. Also, the power supply has to be finished (I am using a laboratory power supply meanwhile). I try to add some functionalities (like a source selector) and publish it on Github.
SSH Bastion
[repo] At OVH, I had the pleasure to work with a good bastion written in Perl. When I left OVH, I told myself it would be fun to create an open source one. That’s a cool project I am working on with friends.
House renovation
A friend of mine recently bought a house where everything has to be redone. So we are working on recreating every floor, wiring new electrical cables everywhere and adding switchboards. We are tearing down almost every wall to lay new ones.
Car maintenance
I have always been by passionated by mechanics and more specifically automotive mechanics. I learnt a lot about it and now perform most of my car maintenance by myself. I always enjoy to help friends with their car when needed. I also love to be helped by other friends who are better than me or by my father.
Some cool major projects from school
PCB part picker

We created a PCB part picker from scratch. We 3D printed almost all parts except the wood pieces we cut and aluminium pieces we drilled.

Coffee machine with NFC payment

We tried to improve a coffee machine to be payable with the NFC card of our school. It involved high power control, temperature regulation and embedded development.

Creating a redundant infrastructure from litteraly nothing

From nothing, we created a highly available infrastructure. We ran fibers, configured routers and switches and created virtual machines on Xen.
Some other projects I never had the time to write a blogpost about
  • An Arduino embed card to check Cisco port status via serial
  • PCI-Passthrough KVM to play on Windows while being on Linux
  • An Analog to Digital Converter (ADC) with a FPGA (in VHDL)
  • The control of a robotic arm taken from a kid toy (in C)
  • A robot that grabs cans and transports them with NXT Lego (in C)
  • A VGA driver with a FPGA (in VHDL)
  • XBOX 360 homebrews
  • PSP PRX plugin in the vein of VSH Menu before it was cool

Other

Human languages

French Native language
English Used to be fluent
Japanese Used to understand
Spanish Hablo un poquito

Computer languages

Languages I love C C++ Perl Go Latex SQL VHDL Bash Web(HTML, CSS, JS)
Languages I can write if needed PHP Python
Languages I had fun to use once C# HLSL Lua

Technologies

Editors and IDE Vim (and only Vim)
Operating Systems Debian Fedora Gentoo Kali/Backtrack Ubuntu Windows
Automation Ansible Puppet Salt
Virtualization / Containers Proxmox KVM Docker Nomad Xen VMware
Service discovery and secrets Consul Vault pass
Major projects I contributed to Apache HAProxy Ceph’s containers

Hobbies

Music
I listen to music all the time! I also enjoy going to concerts and festivals. I try to make some on guitar, bass and drums. Sometimes, I even take the risk to sing (poorly).
Sports
After 12 years of archery, I switched to new sports. I now enjoy crossfit, pilate and a lot of climbing.
Travel
I like to travel in other countries, experiencing other cultures. I already had the pleasure to visit U.S.A., Canada, South Korea, New Zealand, many islands of French Polynesia and Japan (4 times).
Readings
I love to read when I have the time. Except some particular books like Ubik, I prefer to read technical magazines and writings (like O’Reilly or Misc).