Jelle Raaijmakers

Jelle is the COO of the Ladybird Browser Initiative, a San Francisco based non-profit operating on donations and sponsorships. He has been involved with the SerenityOS project since 2021, which gave birth to the Ladybird browser. He oversees operations and finances while remaining actively involved in the browser’s development and day-to-day coding.

Patrick Brosset

Patrick has been working with web technologies for over 2 decades. He has built websites and apps, libraries and open-source frameworks, and has worked on both Firefox and Chromium DevTools.

Patrick currently works at Microsoft as a developer relations PM on the Microsoft Edge team. He is passionate about the web platform, PWA, and DevTools, and writes a lot of articles about it at on his blog, CSS-Tricks, Smashing Magazine, and others.

Sara Joy

Sara has been extremely online since 1998, making her own personal websites since 1999. She fell off the wagon some time around 2010, until getting back on it in 2021 to switch her career from electronic engineering to front end web development. She loves the web platform, and wants it to be accessible to everyone.

Adam Argyle

Adam is a bright, passionate, punk engineer with an adoration for the web who prefers using his skills for best in class UI/UX and empowering those around him. He’s worked at small and large companies, and built an app for pretty much every screen (or voice). He is capable of over-engineering, but spends lots of brain power not to. Loves CSS, loves JS, loves great UX.

Una Kravets

Una is a Developer Relations Engineer at Google Chrome where she leads the Web UI & DevTools DevRel team. Previously, she was the Director of Product Design at Bustle Digital Group and worked on building maintainable design systems as a UI Engineer at DigitalOcean and IBM. Una is the co-host of the CSS Podcast and Designing in the Browser video series. She has built open source libraries such as CSSgram, spoken at over 80 developer events around the world, and is an avid calligrapher/doodler.

Manuel Matuzović

Manuel is a freelance frontend developer, accessibility auditor, teacher, author, and consultant who’s passionate about the web. He writes about accessibility, HTML, and CSS on his personal blog matuzo.at and on htmhell.dev.

Lea Verou

Lea has been improving the Web for nearly two decades. In her 14 years in the CSS WG, she designed many features you use daily. As a twice elected W3C TAG member, she helped document the Web’s Design Principles. She is also a TC39 delegate, and a WHATWG contributor. In 2025, she was awarded Pathfinder for Standards by the OpenJS Foundation, for her overall work and impact.

Lea is passionate about making complex concepts approachable, through her talks, books, and open source work. She holds a PhD from MIT, where she spent a decade researching and teaching at the intersection of usability, design, and web technologies.

She lives in Cambridge, Massachusetts and works as an independent consultant with clients ranging from startups to some of the world’s most recognized companies.

Lyra Rebane

Lyra Rebane is a security researcher and former Cohoster from Estonia with a bunch of browser CVEs and a love for the web. She loves writing CSS, be it as a styling language for web design, or as a programming language for making games. Check out her cool website at lyra.horse.

Niels Leenheer

Niels is a self-professed browser geek. Back in the day, he created HTML5test, and loves the web platform and standards. He has a huge collection of weird devices with even stranger browsers. Recently, he recreated Doom with CSS 3D transforms and animations. He also created a CSS-powered flamethrower, which he is legally prohibited from demonstrating under city ordinances. For his day job, he is CTO of Salonhub and creates web applications for hair salons.

Josh Tumath

Josh is a front-end developer who loves CSS. He has been a developer of the BBC’s Web Design System since it’s humble beginnings over six years ago. He also represents the BBC at the CSS Working Group, which he joined in the summer of 2024. He’s been making it up as he goes along since then.

He is a massive extrovert and loves meeting new people! Please say hello!

Kevin Powell

Kevin is a CSS evangelist and educator whose primary goal is to help people fall in love with CSS and, failing that, to at least help them be a little less frustrated by it. He is best known for his YouTube channel, where he posts weekly educational videos that, he hopes, help both inspire and empower people to improve at CSS.

Ana Rodrigues: MC

Ana works as a front-end developer at tech-for-good agency Hactar. She started coding as a teenager building fan sites, and has been working as a front-end developer for the last 12 years.

Nowadays, Ana spends most of her free time experimenting on her personal blog and is particularly interested in ethics, IndieWeb, sustainability, privacy, and all things CSS.

Bruce Lawson: MC

A veteran of the browser wars, many a standards skirmish and an accessibility apocalypse or two, Bruce now leverages synergies for Vivaldi browser.

When web standards finally makes him a billionaire, Bruce has no plans to go to Mars, but will continue making music with the cruellest months.