Maël Nison
Staff Software Engineer at Mistral AI
Nantes, Pays de la Loire, France
Summary
🤩
Rockstar🎓
Top SchoolMaël Nison is a Staff Software Engineer with 14 years of experience focused on developer experience, improving productivity and stability across large-scale developer tooling and applications. He has driven developer-facing initiatives at Facebook and Datadog and now works on DevX at Mistral AI while leading the Yarn project, blending product-minded engineering with maintenance of a major package manager. A prolific open-source contributor, Maël has influenced core projects like Node.js, Next.js, Create React App, Gatsby and Jest, and is the lead maintainer for Yarn/Berry—work that helped bring Plug'n'Play and Corepack support into mainstream workflows. He routinely tackles low-level robustness (filesystem shims, FS APIs) and high-level build ergonomics (webpack, TypeScript, PnP), bridging runtime, tooling and developer workflows. Based in Saint-Herblain, France, he combines startup grit with large-company scale experience and a knack for shipping subtle but impactful DX improvements. Outside work he channels that focus into sustained open-source stewardship, maintaining widely used tools that quietly shape many developers' day-to-day.
14 years of coding experience
12 years of employment as a software developer
EpitechExchange student Computer Engineering, Exchange student Computer Engineering at Concordia UniversityGoogle Academy Marketing, Google Academy Marketing at HEC Paris
French, English
Stackoverflow
7,233reputation
4.1mreached
78answers
85questions
angularjs
top-5%
yarnpkg
top-5%
Github Skills (56)
babel610
dependency-management10
zero-configuration10
filesystem10
javascript10
c-language10
npm10
pnpm10
package-management10
testing10
typescript10
nextjs10
file-operations10
webpack10
snapshots10
Programming languages (28)
Github contributions (5)
nodejs/corepack
Mar 2020 - Jun 2022
Package manager version manager for Node.js projects
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:1 release, 121 reviews, 87 commits in 2 years 3 months
Contributions summary:Maël primarily contributed to the `corepack` repository, which acts as a bridge between Node projects and their package managers. The contributions involved improvements, bug fixes, and refactoring of the codebase. Specific commits include fixing entry points, updating shimming mechanisms, and implementing transparent commands. Additionally, the user worked on improving the tests.
nodejspackage-manageryarnpnpmnpm
yarnpkg/berry
Sep 2018 - Jan 2023
📦🐈 Active development trunk for Yarn ⚒
Role in this project:Back-end Developer
Back-end DeveloperContributions:19 releases, 579 reviews, 1333 commits in 4 years 4 months
Contributions summary:Maël's contributions focused on implementing and testing the PnP "loose" mode within the Yarn Berry package manager. They made changes to several core files, including modifications to buildNodeModulesTree and makeApi. These changes involved implementing PnP-loose mode, adding version-related updates, upgrading ESLint, and ensuring the code's functionality through comprehensive testing.
yarnnpm-clijavascriptpackage-managernodejs
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