Julien Tellier is a consultant manager and former architect with 11 years of experience helping organisations design evolvable information systems and ship reliable products in production. Based in Paris and co-leading OCTO Technology’s ProdFirst team, he blends hands-on development and software craft practices (TDD, SOLID, Clean Architecture, mob/pair programming) with pragmatic product and delivery coaching to reduce time-to-market and raise team knowledge. He also drives internal R&D tooling and a transverse program to improve managerial practices through evaluation, training and shared rituals. Julien favors co-constructed vision over isolated elegance, and treats management as a lever for impact—focusing on psychological safety, career follow-up and collective skill uplift. Early R&D work for the French Ministry of Defence gave him experience in real-time data flows and protocol tooling, reflecting a taste for complex, production-critical systems.
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Julien Tellier - Consultant Manager at OCTO Technology