Thomas Zilliox
Expert CSS Freelance à Lyon

I am a Freelance CSS Expert

Need CSS expertise?

Bad CSS can slow down your development team, reduce the quality of your application and make you miss new markets.

Common warning signs that you might need help with your CSS:

  • You have a CSS file with thousands of lines,
  • Every deployment comes with new browser compatibility bugs,
  • You need a front-end development for every new feature,
  • You want a responsive version, but it seems impossible…

What can I do

I know how to produce great CSS and I worked for 6 years as a front-end/back-end developer. That allows me to collaborate with tech teams and understand what they need to improve their workflow.

Some of the solutions that I can bring to your team:

  • CSS trainings & workshops,
  • Help to choose best practices & a test strategy,
  • CSS cleanup & migration to a preprocessor Sass/Less,
  • Production of reusable elements & style guide…


In the Piwik project, Thomas has demonstrated expertise in helping us create beautiful and maintainable CSS.

He was able to quickly understand our large and complex codebase.

Thomas proposed several major improvements and delivered them with the highest quality standards.

Matthieu Aubry, Project Manager at Piwik.

Get in touch!

That's my face!


Je suis Thomas Zilliox, l'homme qui murmurait à l'oreille des chevrons, un développeur CSS freelance sur Lyon.

Je suis aussi le co-créateur de la société Zupple qui crée, organise, et anime des team building et escape games à Lyon.