Sylvain Corlay - Founder at PyData Paris

Sylvain Corlay

Founder at PyData Paris

Paris, Ile-de-France

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Summary

🤩

Rockstar

🎓

Top School

Sylvain Corlay is a founder and open-source engineering leader with 12+ years building developer-facing tools and infrastructure from Paris, best known for co-creating Voilà, Xeus, and xtensor and for leading QuantStack and Notebook.link. He combines deep C++ and Python systems expertise with front-end polish—contributing across Jupyter, JupyterLab, ipywidgets and IPython to improve kernels, widget integration and UX at scale. As a long-time Jupyter steering committee/core-team member and former NumFOCUS director, he blends technical stewardship with community governance and conference organization (PyData/Compute!). His work spans build systems, packaging (conda-forge, mamba, repo2docker) and high-performance libraries, reflecting a rare full-stack fluency in scientific computing. He holds a PhD-level mathematical background and has translated research-grade numerical methods into production-grade tooling used by millions. An ACM Software System Award recipient for Project Jupyter, he often bridges academic rigor and practical developer experience in surprising cross-language projects.

12 years of coding experience

8 years of employment as a software developer

Agrégation, Mathematics, Agrégation, Mathematics at ENS Paris-Saclay

Doctor of Philosophy (PhD), Applied mathematics, Probability theory, Doctor of Philosophy (PhD), Applied mathematics, Probability theory at Pierre and Marie Curie University

French, English

Github Skills (103)

messaging10

operation10

python10

testing10

bash10

ipython10

cmake10

jinjava10

tcp-protocol10

parallel-computing10

backbonejs10

pybind1110

backbone10

installers10

web-widgets10

Programming languages (24)

PowerShellC#C++CSSJinjaCRustCMake

Github contributions (5)

jupyter-xeus/xeus-cling

Jul 2017 - Jan 2023

Jupyter kernel for the C++ programming language

Role in this project:

Backend Developer

Contributions:1 review, 256 commits, 193 PRs in 5 years 6 months

Contributions summary:Sylvain primarily focused on updating and refactoring the `xeus-cling` Jupyter kernel for C++. Their commits involved improving core functionality by modifying the interpreter's behavior, particularly regarding execution, completion requests and rich display features. Furthermore, they addressed issues, such as error handling and output redirection. The contributions included adding new features, such as clear output and improved documentation, as well as making various formatting enhancements.

kernelc-programmingc-programming-languagec-plus-plusc-plus-plus-14

jupyter-xeus/xeus

Jan 2017 - Sep 2022

Implementation of the Jupyter kernel protocol in C++

Role in this project:

Backend Developer

Contributions:5 reviews, 220 commits, 174 PRs in 5 years 9 months

Contributions summary:Sylvain primarily focused on updating and improving build instructions and dependencies within the project. They modified the example echo client, including changes to the main file and client header, and also added C++11 support. Additionally, the user contributed to documentation by adding a skeleton for the project's documentation.

kernelcppc-plus-plusjupyter-kerneljupyter

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