Sylvain Corlay - Founder at Project Jupyter

Sylvain Corlay

Founder at Project Jupyter

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

French, English

Github Skills (102)

messaging10

operation10

python10

testing10

bash10

ipython10

cmake10

jinjava10

tcp-protocol10

parallel-computing10

backbonejs10

pybind1110

backbone10

installers10

web-widgets10

Programming languages (24)

C#PowerShellC++CSSCRustCMakeTeX

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.

cppjupyter-kernelsprogramming-languagec-plus-plus-14

jupyter-widgets/ipyleaflet

Apr 2016 - Apr 2022

A Jupyter - Leaflet.js bridge

Role in this project:

Front-end Developer

Contributions:1 release, 247 commits, 180 PRs in 6 years

Contributions summary:Sylvain's commits focused on updating the `ipyleaflet` library to be compatible with `ipywidgets` version 5.0 and adding support for custom models. The user added JavaScript code for creating Leaflet custom models. Additionally, the commits involved fixing tile display issues and integrating the library with JupyterLab, including dynamic webpack public path setup and build configurations, and updates for JupyterLab versions.

jupyterleafletjsjupyterlab-extensionleafletvisualization

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