CSS Day @cssday.nl The annual CSS conference that brings specifiers, implementors, teachers, and authors together to discuss the current state of CSS, upcoming features, and cool demos.
https://cssday.nl
3rd and 4th of June 2027
Amsterdam
Curated by PPK
Michael Hladky @michael-hladky.bsky.social Nx, Monorepo, Web Performance, Architecture, Angular, Reactive Programming
Nadia Makarevich @adevnadia.bsky.social 👩🏻💻 Coder, Writer, Educator | ex. Atlassian, Jira | Principal Engineer
📝 Developer Way Blog: https://www.developerway.com
📘 Advanced React book: https://www.advanced-react.com
📘 Web Performance Fundamentals book: https://www.getwebperf.com
Hugo Nogueira @marabyte.com Building LEGO.com with actual LEGO bricks is a tough job but I’m glad I get to do it!
Vinai Kopp @vinai.bsky.social Hyvä, Magento, D&D, Chess
@pieded.bsky.social @pieded.bsky.social Sartre account
🦣 @pieded@techhub.social
Marc Görtz @marcgoertz.de Frontend developer from Germany. Building user-friendly things on the web. Occasionally obsessing over typography and SVGs. 👨🏻💻
Eager euphonium player […]
🌉 bridged from ⁂ https://mastodon.social/@mrcgrtz, follow @ap.brid.gy to interact- D @davehunt.bsky.social @davehunt.bsky.social
Ines Akrap @inesakrap.bsky.social Frontend engineer. Web performance and sustainable web. Co-chair W3C Sustainable Web Interest Group. Co-author of Building the Sustainable Web.
rich harris @rich-harris.dev my life is derp and i do derp shit
Ethan Gardner @ethangardner.com I'm a full stack engineer with a bias toward the front-end. Web performance optimization, accessibility, and all that jazz.
Adrian Holovaty @holovaty.com Web developer, guitarist, cocreator of Django web framework, tinkerer with digital sheet music encoding and rendering. Currently making Soundslice.
Rik Schennink @rikschennink.com Solopreneur • Founder Pqina • Maker of Pintura and FilePond • Web enthusiast • Loves Bouldering • https://pqina.nl
Kevin Farrugia @imkev.dev Frontend Engineering. Web Performance. Be kind.
Tom {🌾🍉🫒} @bestebreurtje.bsky.social software engineering 🦄 lead • a11y 🦾 • ally 🏳️🌈 • cybersec wannabe • tall nerd
• he/him 🥑🎮
Dave Letorey @letorey.co.uk Organiser: https://londonwebstandards.org
Dancer: Gigs/Clubs/Festivals
Owner: https://code-red.uk
Wearer: Red Hats
Sander van Surksum @sandervs.bsky.social Web performance enthousiast - father of 4 daughters - parttime muralist
founder of https://www.iron-out.io
@shortdiv.bsky.social @shortdiv.bsky.social 
Alex Suzuki @alexsuzuki.com Solo founder/dev of https://strich.io
Husband, father, reptile lover 🦎🐊🐍
Based in Switzerland 🇨🇭
Michal Mocny @mmocny.com Web Vitals, Speed Metrics, and #webperf @ Google.
Previously: AR, Physical Web, WebApps, Startups.
Autodidactic Geek, Woodworker, Sailer. Proud Father of 3 boys.
Vinicius Dallacqua @webx.bsky.social Into browsers and agentic systems.
Engineering QA.tech
Building https://agent.perflab.io
Into film photography and web performance nerd.
Marcy Sutton Todd @marcysutton.com Senior engineer frontend infrastructure at @KhanAcademy.org, accessibility advocate, cyclist, hiker, wife, mom 💚 Bellingham, WA
Barry Pollard @tunetheweb.com Web Performance Developer Advocate at Google Chrome helping to make the web go faster! All opinions my own.
ppk 🇪🇺 @quirksmode.org technical writer - #browser expert - #cssday and #perfnow conference organiser - #history geek - former Later Roman Empire specialist - native of #Amsterdam - https://quirksmode.org
Jack Franklin @jackf.io Googler focusing on web performance and performance tools.
Find me online at https://jackf.io
Léonie Watson @tink.uk Accessibility engineer, Director of TetraLogical, Chair of W3C Board of Directors, W3C WebApps WG co-chair, writer and speaker, screen reader user, tequila drinker and crime fiction junkie.
Vitaly Friedman @vitalyf.bsky.social Practical insights for better UX • Running “Measure UX” and “Smart Interface Design Patterns” • Founder of SmashingMag • Speaker • Loves writing, checklists and running workshops on UX. 🍣
Measure UX → https://measure-ux.com
Andrew Betts @triblondon.trib.tv Drinking best practices; Ex Fastly, W3C TAG, Financial Times. I will sort your pens in order of length while you're not looking. 🌈🍸🇪🇺🚅🍜
Paul Irish @paul.irish web performance and DevTools, mostly.
In '97 I wrote a paper for English class on HTML Image Maps. I haven't changed much since.
Mark Zeman @markzeman.com Founder @speedcurve.com, Hopeful idealist
Andy Davies @andydavies.me Web Performance Consultant @speedcurve.com (acquired by @embrace.io)
Vegetable grower… Eurorack synth dabbler… Bristol Bears Women’s fan
https://andydavies.me
Phil Hawksworth @philhawksworth.dev Developer adoption at @cloudflare.social.
Previously @deno.land, @netlify.com,
Late-blooming choir boy.
Eater of foods.
https://philhawksworth.dev
he/him
Patrick Meenan @patmeenan.com Web performance geek on the Chrome team at Google.
Formerly WebPageTest, Meta, Cloudflare, AOL...
Matt Hobbs (he/him) @therealnooshu.bsky.social • ex-Head of Frontend Development @ Government Digital Service (GDS).
• Passionate about #webperf & F1.
• Cancer survivor (grade 3 brain cancer, I named Gary).
• Don't blame my employer for the dumb things I say.
• https://hachyderm.io/@TheRealNooshu
Robin Marx @programmingart.bsky.social Network protocols (HTTP/2, HTTP/3, QUIC) and Web performance
at Akamai. PhD. Dad. Longsword fencer. He/Him.
http://linkedin.com/in/rmarx
@programmingart@mastodon.social
Stoyan Stefanov @stoyan.me stoyan.me, PerfPlanet, "JavaScript Patterns", "React: Up & Running", YSlow, SmushIt. Formerly of Facebook, WebPageTest, Yahoo
Nic Jansma @nicj.net Software developer building high-performance websites, apps, observability + OS tools @ Cloudflare. W3C WebPerfWG+RUMCG co-chair. he/him. ex-AKAM/MSFT.
Tim Vereecke @timvereecke.bsky.social Loves speeding up websites. Web performance architect @Akamai, also runs https://www.scalemates.com #WebPerf #PageSpeed #SEO
Ryan Townsend @twnsnd.com Principal Product Manager @ Cloudflare • Public Speaker • 20+ YOE in Tech, 10 as CTO • LessonsofaCTO.com
Ivan Akulov @iamakulov.com Web perf engineer @ Framer. Prev. web perf consultant (Google, Appsmith, Toggl, etc). Getting React interactions 2-4x faster. GDE. He/him 🏳️🌈
DebugBear @debugbear.com Learn about page speed, measure your website performance, and monitor Core Web Vitals metrics over time.
https://www.debugbear.com/
Scott Jehl @scottjehl.com Web Designer/Dev. Accessibility & Performance Fan. Mediocre surfer.
Engineer: Squarespace Performance & Accessibility
My Web components course: $25 if you use the code TWENTYFIVE https://scottjehl.com/learn/webcomponentsdemystified/
scottjehl.com
Sia Karamalegos @sia.codes Freelance web developer & performance engineer. Speaker, writer, teacher, tech community organizer. Google Dev Expert in web technologies, ex-Shopify. she/her. Durham, NC, USA.
Tech: sia.codes
Non-tech: offline.sia.codes
Art/photos alt: @sia.studio
Estela Franco @guaca.bsky.social Web Performance @ Shopify
Tired mom 👦👶
Passionate about Web Perf, Web Standards, TechSEO, & Rock Music.
Google Dev Expert in Web Technologies
#mujeresenseo
🌐 estelafranco.com
🐘 https://toot.cafe/@guaca
📍 Barcelona
Keerthana Krishnan @keerthanak17.bsky.social 
Stuart McMillan @stuart-mcmillan.com Digital geek, long time believer in great user experiences. I want to make websites better for all users and the businesses that run them.
Also, dad to Iona and Murdo.
I self-identify as a runner.
https://stuart-mcmillan.com/
Henri Helvetica 🧑🏾🚀🇭🇹 @henrihelvetica.bsky.social 📍 ec2-ca-central-1
👷🏾♂️ command-h
🏃🏾♂️ #RunnersInTech
🗣️ pronounced: on-REE
Dora Militaru @doramatadora.bsky.social Scaling microservices at Gousto. Built stuff at Fastly and the Financial Times. Web performance matters.
Yoav Weiss @yoav.ws On a mission to make the web faster, one perf feature at a time. Web platform @ Shopify. WebPerfWG and WICG co-chair. RICG4life. Opinions are my own, etc. 
Jodie Chan @jodiechan.bsky.social Cross-border web perf specialist by day, singer songwriter by night. Look for the one with the pink hair :)
Let's chat on #webperf, #music, #extremetrekking
Paul Calvano @paulcalvano.bsky.social 
@erwinhofman.bsky.social @erwinhofman.bsky.social Google Developer Expert in web performance
CTO @ RUMvision.com
Also sharing over at https://linkedin.com/in/erwinhofman
Mandy @mandymichael.bsky.social Lead Software Engineer, Frontend Dev, Speaker, Eng Manager (she/her) | GDE Web Tech, Microsoft Regional Director (MVP program) | http://instagram.com/adognamedjello
Rick Viscomi @rviscomi.dev Chrome DevRel at Google, web developer
rviscomi.dev
Karlijn Löwik @karlijnlowik.bsky.social CEO & Co-founder @RUMvision | Simplifying web performance | Women in tech advocate | Toddler mom | International speaker | Lover of memes | Co-chair RUM W3C | Board member Mage-OS NL
Feels like this bio is getting really long😅
ᴀʟᴇx ʀᴜssᴇʟʟ @infrequently.org Trying to make a web that works for everyone.
Also at https://toot.cafe/@slightlyoff
For more: https://infrequently.org/about-me/
https://infrequently.org/
Paul Williams @pcwilliams.net Space/tech/music/kindness light my fire. Supporting STEM & education initiatives with Big Change & Mission 44; founded a scholarship at Virgin Galactic. I work for Bloomberg; opinions my own. I try and keep up with myself at https://pcwilliams.design
Jason Williams @jason-williams.co.uk JavaScript Infrastructure & Tooling @Bloomberg @TC39, creator of Boa (JS Engine)
Katie Sylor-Miller @ksylor.bsky.social Principal Frontend Engineer. Fairy Gitmother at ohshitgit.com. Thoughts are mine not my employer’s #GNUTerryPratchett
Jason Grigsby @gri.gs 
Anna Migas @szynszyliszys.bsky.social Lead UI Developer at Field Intelligence and public speaker. Google Developer Expert in web technologies. I am all about web performance and tech conferences.
Harry Roberts @csswizardry.com 🚀 Independent Web Performance Consultant • Speaker • Google Developer Expert, Web Performance • Accepting new clients • https://harry.is/for-hire
Tammy Everts 🍁 @tammyeverts.com I contain multitudes, but for brevity: reader, writer, speaker, baker, quilter, yoga-er, mom-joke teller, lover of lakes and mountains.
🫶 Building #UX / #webperf / #o11y community at @embrace.io (which acquired @speedcurve.com)
🫶 Co-chair of @perfnow.nl
Tim Kadlec @tkadlec.bsky.social Principal Product Manager @cloudflare—focused on performance and observability.
Co-chair of https://perfnow.nl
Taller than my photo looks. 
Annie Sullivan @anniesullie.com Chrome Web Platform Engineer (Core Web Vitals). USDS alum. Mom. Loves OCR training, making and crafting. Hates facists.
danielroe @danielroe.dev 🏡 https://roe.dev
➕ building @nuxt.com • @npmx.dev • @nitro.build • https://elk.zone
💝 https://page-speed.dev • https://firstcommit.is • https://react-to-nuxt.com
🏅 Google GDE • Microsoft MVP • GitHub ⭐️
he/him
signal: danielroe.57
🧗♂️ ⛷️ 🚴♂️ ✝️
📍 edinburgh 🏴
Eric Bailey @ericwbailey.website #accessibility / #a11y advocate, post enjoyer.
🌐 https://ericwbailey.website/
✉️ https://ericwbailey.website/newsletter/
Bluesky @bsky.app official Bluesky account (check username👆)
Bugs, feature requests, feedback: support@bsky.app