Gael Metais
Web Performances Expert at Freelance
France
Summary
🤩
Rockstar🎓
Top SchoolGaël Metais is a Web Performance Expert with 12+ years of hands-on experience helping companies slash page load times and improve user engagement across large-scale sites and ecosystems. He combines deep browser-level knowledge (rendering, networking, JavaScript) with practical experience in monitoring, tooling and CDN/cache strategy, having built performance programs at organizations like CHANEL and France Télévisions. As a freelance consultant and contributor to projects such as the Chromium-based phantomas metrics tool, he delivers audits, firefighting fixes, long-term improvements and team coaching. At WP Media he applies that expertise to client-facing WordPress optimizations, and his work has repeatedly produced multi-fold page speed improvements. Known for tackling complex, edge-case problems, he blends architectural thinking with developer-facing solutions to make performance a measurable product advantage.
12 years of coding experience
9 years of employment as a software developer
2006, Informatique, 2006, Informatique at EFREI - Ecole Française d'Electronique et d'Informatique
French, English, Italian, German
Stackoverflow
834reputation
920kreached
19answers
0questions
Github Skills (20)
puppeteer10
javascript10
chromeless10
headless-browser10
web-performance10
dom-manipulation10
automation10
automations10
metric9
html8
developer-tools8
chromium8
css8
testing7
preconnect6
Programming languages (11)
Github contributions (5)
macbre/phantomas
Sep 2014 - Mar 2021
Headless Chromium-based web performance metrics collector and monitoring tool
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:5 reviews, 92 commits, 44 PRs in 6 years 7 months
Contributions summary:Gael primarily contributed to the `phantomas` project by improving its web performance metrics collection capabilities. Their work involved adding new metrics, such as `DOMqueriesAvoidable`, and fixing bugs related to DOM path generation and caching. They also made adjustments to the test environment and handled various edge cases, including fixing a bug related to duplicated DOM IDs.
headless-chromiumdeveloper-toolschromiumphantomasmonitoring
gmetais/UXFirst
May 2014 - Jul 2016
Contributions:15 commits, 3 pushes in 2 years 2 months
badslowcssjavascriptuser-experience
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