dotJS 2019

The world's largest sharpest TEDiest hottest offline-iest
JavaScript conference

December 5-6, 2019 Paris, France

Register now

2018 video recap

Speaker lineup:

Day 1, Frontend

December 5th
Evan You

Evan You

Evan is an independent open-source developer. He is the creator and lead maintainer of Vue.js, a JavaScript frontend framework.

Chris Heilmann

Chris Heilmann

Chris dedicated the last 20 years of his life to make the web work and thrive. As a lead developer on some of the largest web products at Yahoo and Mozilla, he learned that knowledge is not enough without teamwork and good handover. He is the author of several JavaScript books and the Developer Evangelism Handbook. Chris is currently Program Manager for Open Web and Browsers at Microsoft.

Sara Vieira

Sara Vieira

Sara is a developer at CodeSandbox. GraphQL and Open Source enthusiast. Conference Speaker and Airport expert. She's also a fan of horror movies, has talents such as banging sticks into a drum kit and saying the wrong thing at the wrong time.

Phil Hawksworth

Phil Hawksworth

Phil is Principal Developer Advocate at Netlify. With more than 20 years in the web industry, he worked as Technology Director at R/GA serving clients around the world such as Nike, Google, Beats By Dre and Samsung. He now looks to simplify and modernize legacy technology approaches.

Day 2, Backend & Language

December 6th
Charlie Gerard

Charlie Gerard

Charlie is a front-end developer at Atlassian in Sydney, a Mozilla Tech Speaker & Google Developer Expert in Web Technologies. She is passionate about creative coding and building interactive prototypes mixing science, art and technology. She also spends time giving back to the community by mentoring new developers, contributing to open-source projects and speaking at conferences.

Vladimir Agafonkin

Vladimir Agafonkin

Vladimir is an open source enthusiast, the author of the Leaflet JS library and the maintainer of 40+ other open source libraries with a focus on algorithms, computational geometry and data visualization. He builds the future of maps at Mapbox and also leads the progressive rock band Obiymy Doschu.

Vlad Filippov

Vlad Filippov

Vlad is a software engineer working on the Web. His work has roamed widely: from desktop web development, to mobile, Android and games. He loves software testing, automation, and reverse engineering. His current focus is the Rust programming language. In the moments he is not coding, Vlad plays tennis and reads comments on the Internet.

Valerie Young

Valerie Young

Valerie is a Sr. Open Web Engineer at Bocoup where she is focused on standards and testing work geared towards making the web a more inclusive and interoperable platform. She is a TC39 delegate, editor of ECMAScript 402 (the Internationalization extension to JavaScript), maintainer of, and contributor to the WAI-ARIA Authoring Practices.

Simona Cotin

Simona Cotin

Simona is a web developer with a passion for teaching. She spends most of her time tinkering with JavaScript in the cloud and sharing her experience with other developers. She was the co-organizer of the AngularJS Dublin and Javascript London meetups.

Daniel Ehrenberg

Daniel Ehrenberg

Daniel is an engineer at Igalia, a free software cooperative. He participates in the TC39 and has dabbled in WebAssembly and web standards. He also worked on V8.

James Long

James Long

James is a developer & designer with over a decade of experience building applications. He created Prettier, the most popular JavaScript code formatter, is the founder of Actual, and explores new ideas for programming. He loves solving real problems for users with a great user experience.

Kassian Wren

Kassian Wren

Kas (they/their/them) have been a Developer Advocate for 5 years, and is currently with Cloudflare. They have contributed to many open-source robotics projects and written 2 books on JS robotics with Johnny-Five. They are constantly making new light-up clothing, and have had a passion for music their entire life.

More speakers to come

More speakers to come

Be the first to know about the next speaker announcements!
Want to send us a talk proposal? Check our CFP.

With our guest emcee:

Christophe Porteneuve

Christophe Porteneuve

Christophe is the founder and CTO of Delicious Insights. He has been doing professional web work since 1995, He’s an author, trainer, conference speaker, and enjoys a solid reputation of expertise in the areas of front-end web dev (most notably JavaScript), Node.js, Git and Rails.


We also have great speakers at dotCSS on December 4th


  • Hakim El Hattab

    Hakim El Hattab

    Co-founder of and Swedish front-end developer

  • Emily Plummer

    Emily Plummer

    Design System Engineer at GitHub

  • David Khourshid

    David Khourshid

    Software engineer at Microsoft, creator of XState & half of the Keyframers.

  • Jason Pamental

    Jason Pamental

    Web typography & variable font expert, author, design leader, and consultant.

  • Ire Aderinokun

    Ire Aderinokun

    Frontend web developer and user interface designer. Co-founder of BuyCoins.


Main events

December 4, 2019

dotCSS 2019

dotCSS is coming back with its sister conference dotJS, in the same venue you all loved in 2018: The Dock Pullman!

This might just be the largest CSS conference, ever ;-)

Dec 5 - Dec 6, 2019

dotJS 2019

dotJS is coming back in 2019 and for the first time it will be a 2-day conference!

Day 1 (Dec 5) will be all about Frontend development (UI frameworks, browsers, ...).
Day 2 (Dec 6) will be about Backend development and JavaScript as a language (Node.js, ES2019, compilers, ...)

Side activities

Dec 2 - Dec 3, 2019

Vue.js Hardcore training

We have partnered with Hackages to provide this 2-day Vue.js HackCamp.

December 4, 2019

Paris.js meetup dotCSS / dotJS edition

Paris.js meetup hosted by Voodoo (dotJS Platinum partner) on the evening of dotCSS, just before dotJS!

Dec 2 - Dec 4, 2019

ES Total training - French only

3 days training provided by our host Christophe Porteneuve to master 100% of ECMAScript (JavaScript)!

Discover the full schedule

What they say about dotJS

Another great day organized perfectly by @dotConferences! Thanks again to the whole team and the speakers for sharing your thoughts on all the interesting topics covered today at #dotjs
Back from #dotJS 2018. As it’s been my 10th time in a @dotConferences, I got a super nice #RaspberryPi Zero with the usual swag 😍. Thanks a lot to the team for the continuing hard work in bringing us a world-class event 👏 !
Really enjoyed @dotJS. Superbly organised, great talks, amazing food, and some lovely folks to chat to. Also some wonderful ethics. Carbon zero conf? Good stuff!

Be the first to know about the next speaker announcements!


  • Speaker announcement
  • Sponsors
  • Schedule
  • News

Thanks to our lovely partners

Each year, our amazing partners help us keep tickets affordable, organize great workshops and welcome you in their stands.
If you want to be one of them, contact us.



  • Microsoft
  • Payfit