Kilian Guillaume is a Technical Leader with 11 years of hands-on experience in low-level development, cybersecurity, and systems engineering, currently based in Calais, France. A daily GNU/Linux user and polyglot programmer (Lua, Rust, C, Python), he blends deep systems knowledge with practical security consulting and R&D leadership. He progressed from developer and apprentice roles into technical leadership at ChapsVision CyberGov after contributing to Corexalys R&D and independent cyber consulting. Kilian contributes to notable open-source projects like the Xonsh shell, where he improved color handling for a better user theming experience—an example of his attention to UX even in low-level tooling. Comfortable across devops, embedded-style programming, and security operations, he favors pragmatic, auditable solutions. He holds advanced training in free software engineering and a broad computer science background that underpins his multidisciplinary approach.
11 years of coding experience
2 years of employment as a software developer
Licence, Computer Science, Licence, Computer Science at Université de La Rochelle
Baccalauréat, Sciences, Mention Assez Bien, Baccalauréat, Sciences, Mention Assez Bien at Lycée Richelieu
Computer Engineering, Computer Engineering at École pour l'Informatique et les Techniques Avancées
Master, Ingénierie du logiciel libre, Master, Ingénierie du logiciel libre at Université du Littoral Côte d'Opale
:shell: Python-powered shell. Full-featured and cross-platform.
Role in this project:
Back-end Developer
Contributions:3 reviews, 13 commits, 4 PRs in 2 months
Contributions summary:Kilian contributed to the Xonsh shell by modifying color-related functionalities. They refactored color handling, introducing a `RESET` token, deprecating `NO_COLOR`, and adding a `DEFAULT` color. The changes involved modifications across multiple files including `xonsh/ansi_colors.py`, `xonsh/pyghooks.py`, `xonsh/color_tools.py`, and related test files, indicating a focus on improving the shell's user interface and color theming capabilities. These improvements enable better control and a more consistent experience for users customizing the Xonsh shell.
Contributions:48 commits, 2 PRs, 31 pushes in 1 month
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Kilian Guillaume - Technical Leader at ChapsVision CyberGov