Léo Valais
Rust Backend Software Engineer at SNCF Réseau
Paris, Ile-de-France
Summary
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Rockstar🎓
Top SchoolLéo Valais is a pragmatic Rust backend engineer with 9 years of experience, based in Paris, currently developing and owning a Rust middleware webservice for the OSRD open-source railway design project at SNCF Réseau. He combines low-level systems thinking with practical web service design (axum, tokio, diesel) to improve API ergonomics, async simulation scheduling, and robust error handling in safety-critical infrastructure tooling. Previously at Thales he built an asynchronous Python service and PyQt GUI to automate production chains and manage firmware/JTAG programming, showing fluency across Rust and Python in both backend and hardware-adjacent domains. His background includes research work in stereovision and image processing for Airbus and contributions to open-source railway tooling via the OpenRail Association, reflecting a blend of academic rigor and production-focused engineering. Notably, he emphasizes developer experience and idiomatic, maintainable code while tackling complex domain-specific algorithms like authorization, search/matching, and scheduling.
9 years of coding experience
2 years of employment as a software developer
Computer Science Engineering, Computer Science Engineering at EPITA
English, French, Spanish
Github Skills (33)
asynchronous10
simulation10
javascript10
concurrent10
ocsigen10
futures10
fibers10
in-progress10
io-uring10
fullstack-development10
io10
full-stack10
ocaml10
designer10
structured-concurrency10
Programming languages (8)
Github contributions (5)
leovalais/cl-lsystem
May 2019 - Jun 2019
Contributions:100 commits, 3 pushes in 1 month
leovalais/macosbox
Sep 2018 - Feb 2024
Contributions:3 pushes, 1 branch in 5 years 5 months
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