Guillaume Lagrange is a founding systems engineer with nine years of experience building embedded and full-stack software, now leading technical efforts at CodSpeed after roles at Stockly, Theodo, and Netatmo. Trained in embedded systems at Télécom Paris, he combines low-level firmware expertise with practical product engineering, having shipped connected-device software at Netatmo and contributed frontend tooling earlier in his career. He thrives in early-stage environments—his current founding role follows hands-on positions across startups and consultancies where he moved quickly from prototype to production. Active on GitHub as Guiom and building at CodSpeedHQ, he blends systems thinking with a developer-first mindset and an eye for pragmatic solutions that scale.
9 years of coding experience
5 years of employment as a software developer
Master's degree Embedded system software, Master's degree Embedded system software at Télécom Paris
Classe préparatoire MPSI puis MP* (x2), Classe préparatoire MPSI puis MP* (x2) at Lycée Janson de Sailly
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Guillaume Lagrange - Founding Systems Engineer at CodSpeed