chajun

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Summary

🤩

Rockstar

Jianjun Chen is a Lead Member of Technical Staff in Data Science with a strong track record building ML-driven products for payments, fraud prevention, and cloud/AI security across Microsoft and Salesforce. He combines over four years of hands-on modeling and engineering experience with two years of team leadership, shipping production-grade solutions using Python, SQL, R, SAS and techniques like gradient boosting and clustering. Jianjun also contributes to high-profile open-source front-end work (notably Microsoft’s Fluent UI), demonstrating a rare blend of data science depth and practical engineering on both back-end models and user-facing components. Trained in computer science at Johns Hopkins and with an earlier chemical engineering background from Columbia, he brings cross-disciplinary rigor and an investigator’s curiosity to ambiguous, high-stakes problems.

4 years of coding experience

Github Skills (9)

javascript10

component-kit10

front-end-development10

react10

ui-components10

typescript-types9

typescript9

typescripts9

accessibility9

Programming languages (2)

MDXTypeScript

Github contributions (5)

microsoft/fluentui

Jun 2021 - Jan 2023

Fluent UI web represents a collection of utilities, React components, and web components for building web applications.

Role in this project:

Front-end Developer

Contributions:123 reviews, 128 commits, 309 PRs in 1 year 6 months

Contributions summary:Chajun primarily contributed to the Fluent UI web project, focusing on React components and related UI features. Their work included removing default props, fixing the order of spread props for triggers, and closing popups within iframes. They also addressed issues in the Carousel component, such as fixing the animation for the last slide and clickable navigation. The user's efforts also addressed styling for disabled focusable states and handled the passing of refs to a variety of UI components.

web-componentsreact-component-libraryreact-componentsmicrosoftui-components

chpalac/fluentui

Jul 2021 - Jul 2023

Fluent UI web represents a collection of utilities, React components, and web components for building web applications.

Contributions:669 pushes, 243 branches in 2 years 1 month

reactweb-applicationslitweb-uiweb-components

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