Nicole Sullivan
Engineering Manager, WebKit Layout & Rendering at Apple
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolNicole Sullivan is an engineering leader with 17 years of experience shaping web UI, layout, and rendering at scale for companies like Apple, Google, Salesforce, and npm. She blends product strategy and hands-on engineering—having driven major CSS and layout features in Chrome (Container Queries, Cascade Layers, :has, Subgrid) and led cross-functional teams responsible for style, fonts, layout, DOM, and devtools. A proven shipper of design systems and component libraries, she has helped dozens of teams adopt styleguide-driven development and modern UI stacks while improving accessibility and performance. An active open-source contributor and founder of CSSConf, her work spans tooling like CSSLint, OOCSS, and the Hologram styleguide system, reflecting deep expertise in CSS architecture. Based in San Francisco, she brings a data-driven, research-forward approach to reducing technical friction and accelerating product velocity.
17 years of coding experience
21 years of employment as a software developer
II ex 3, French Language and Culture, II ex 3, French Language and Culture at l'Alliance Française de ParisData Science, Data Science at CourseraBA, Economics, BA, Economics at University of Massachusetts AmherstInformatique, Informatique at Conservatoire national des arts et métiers - Cnam
English, French
Github Skills (25)
markdown10
site-design10
javascript10
csslint10
testing10
css10
ui-design10
ruby10
uid10
css-frameworks10
component-library10
markdown-it10
front-end-development10
html10
website-design10
Programming languages (9)
Github contributions (5)
stubbornella/oocss
Jan 2009 - Sep 2013
Object Oriented CSS Framework
Role in this project:
Front-end Developer
Front-end DeveloperContributions:142 commits in 4 years 8 months
Contributions summary:Nicole primarily contributed to the OOCSS framework by implementing and documenting various CSS grid functionalities. Their work included creating CSS classes for full-width grids, adding documentation with examples, and modifying existing grid layouts. The contributions demonstrate a focus on CSS object-oriented principles and the framework's practical application in web page layouts. Additionally, they modified and enhanced the table styles, adding CSS classes for alignment.
css
CSSLint/csslint
Jun 2011 - Jan 2016
Automated linting of Cascading Stylesheets
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:36 commits, 1 PR, 2 pushes in 4 years 7 months
Contributions summary:Nicole primarily contributed to the testing framework for the CSSLint project. Their commits included creating and modifying test files, specifically focused on rules related to text-indent and width-100. The changes involve writing test cases and verifying CSSLint's behavior against specific CSS code snippets, ensuring the correct identification of potential issues. The user also made updates to the testing files, which included fixing and expanding the existing test coverage.
lintingstylesheets
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