Antoine Lassier is a tech lead and fullstack developer with 11 years of experience, combining entrepreneurial drive and hands-on engineering since founding G.A.R.I., a vehicle assignment software born from his early transport industry internships. Based in Paris, he architects and ships marketplace platforms and enterprise web applications, notably leading the technical design of C2E Market and CPB Market while delivering a multilingual tender management platform for RCI Bank & Services using Django, Vue.js and AWS. He excels at taking a product from prototype to production—owning design adaptation, API/backend development, frontend implementation and hosting—while remaining the primary developer on his freelance projects. His background in applied IT management (M2) and operational maintenance at Keolis gives him a practical, systems-oriented perspective on logistics and fleet software. Colleagues describe him as a pragmatic problem solver who balances long-term architecture with rapid iteration, and his portfolio shows a pattern of building domain-specific tools that simplify complex operational workflows.
11 years of coding experience
Baccalauréat S SI spécialité maths mention européenne en anglais, Baccalauréat S SI spécialité maths mention européenne en anglais at Lycée Benjamin Franklin Orléans
Master 2 (M2) Méthodes Informatique Appliquées à la Gestion des Entreprises, Master 2 (M2) Méthodes Informatique Appliquées à la Gestion des Entreprises at Université d'Orléans
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Antoine Lassier - Tech Lead, Développeur Fullstack at C2E Market