Freelancer profile translated to English.
Back to original languageAbout Sébastien
Co-founder & CTO of Le Wagon for 11 years, this bootstrapped coding bootcamp started in 2014 in Paris and is now operating across all continents. I have contributed to training over 25,000 alumni in fullstack web development (Rails / JS) as well as Data Science (Python, Machine Learning, etc.). Before this long entrepreneurial chapter, I held "Individual Contributor" software developer positions at Google, VirtuOz, and Eventmaker, as well as freelance.
I have been self-taught in programming since the late 90s and have an engineering background through a dual degree from Polytechnique / Telecom ParisTech (2004-2008).
Since 2025, I have been bringing my technical & product expertise, my entrepreneurial experience, and my distributed team management experience to growing companies.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 10km), Marseille (up to 50km)
Experience
- RefragRuby on Rails ExpertVIDEO GAMES AND ANIMATIONMarch 2026 - Today (5 months)Refrag is a multi-platform SaaS company developing the worlds largest and comprehensive Counter-Strike training solution. I joined the Engineering team to bring my Ruby on Rails expertise to improve and enhance the Refrag back-end application.
- Le WagonCo-Founder & CTOEDUCATION AND E-LEARNINGJanuary 2014 - January 2025 (11 years)Paris, FranceDeveloping the curriculi and Teaching at our Web Development & Data Science bootcamps. Led theEngineering team (up to 20 people) using the Shape Up methodology, building the Pedagogical andOperational platform Kitt supporting every aspect of the business. Ruby, JavaScript, Python
- Eventmaker (Acquired by InfoPro Digital)Senior Software EngineerJanuary 2012 - January 2014 (2 years)Paris, FranceFull-stack lead developer on MobiCheckin, a SaaS product for event organisers. Integration of Mandrill,Mailchimp, Highrise, Esendex and Xing Events APIs. Ruby (Rails), JavaScript
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Education
- Master 2 - Software Engineering & NetworkTelecom ParisTech2009
- Engineer of École PolytechniqueÉcole Polytechnique2008