About Bertrand
Senior backend engineer specialized in Rust, with deep expertise in blockchain protocols, low-level systems, and high-performance computing. From designing consensus engines to rescuing unmaintained C++ codebases in production, I operate best where reliability and performance are non-negotiable. Available as a freelance engineer to strengthen your team.
French
Native or bilingual
English
Fluent
Can work on-site
Lorient (up to 50km), Paris (up to 10km)
Experience
- HyléLead Rust EngineerSOFTWARE PUBLISHINGSeptember 2024 - April 2026 (1 year and 7 months)- Led core Rust development of the Hyli blockchain protocol (Autobahn consensus) from design to production-grade implementation- Shipped multiple dev tools (Rust SDK and Hylix crate) enabling faster integration and modular, async architectures for external teams- Cut CI build time from 12 to 4 minutes for a 5-devs team on a 1800+ commit open-source codebase, significantly accelerating iteration speed- Delivered several zero Knowledge applications development (Risc0, SP1, Noir, Jolt) acting as a top contributor and owner accross the stack
- LedgerBackend EngineerSOFTWARE PUBLISHINGApril 2022 - September 2024 (2 years and 5 months)Grenoble, France- Took over ownership of an unmaintained open-source C++ library, resolving ~100 bugs and unblocking long-pending features for production teams- Maintained and evolved Bitcoin account management logic: used by high-value clients holding several thousand BTC, ensuring reliability and security- Diagnosed and fixed critical bugs under time pressure (e.g. client blocked before an audit during christmas holidays), delivering same-day patches to resotre transaction capability.- Improved CI/CD pipelines to speed up feedback cycles and reduce integration friction for the backend team
- Pollen MetrologySDK Product OwnerJuly 2021 - March 2022 (8 months)Moirans, FranceEn complément du rôle dans l'équipe application, s'ajoute le rôle de Product Owner pour le SDK: ¤ Définition et spécification des besoins clients ¤ Planification et répartition des tâches ¤ Guider une vision du produit SDK sur le long terme
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Education
- Diplôme d'ingénieur, Ingénierie informatiqueGrenoble INP - Ensimag2019Diplôme d'ingénieur, Ingénierie informatique
- Master of ScienceThe University of Bonn2019Master of Science - MS, Computer Science