CSS Day

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On 16th and 17th of June, 2016, the ninth CSS Day took place in Amsterdam. This was the first time we added a Thursday with a special theme to the CSS-themed Friday.
Schedule · Speakers · Attendees · Sponsors

Day 1: HTML Special

08:15Doors open
09:00Jeremy Keith<a>
09:50Yoav Weiss<link>
10:40<br>
11:10Peter-Paul Koch<layer>
12:00Simon Pieters<source>
12:50<br type="lunch">
13:50Niels Leenheer<noscript>
14:40Monica Dinculescu<input>
15:30<br>
16:00Peter van der Zee<iframe>
16:50Lea Verou<html>
17:40Partydrinks & discussions

Day 2: CSS Day

08:30Doors open
09:00Harry RobertsCSS for Engineers and Devs
09:50Léonie WatsonCSS and Accessibility
10:40<br>
11:10Vasilis van GemertMediaqueryless Responsiveness
12:00Mark RobbinsCSS and Email
12:50<br type="lunch">
13:50Amelia Bellamy-RoydsCSS and SVG
14:40Chris LilleyCSS4 Color
15:30<br>
16:00Greg WhitworthLayout
16:50Una KravetsBlend Modes
17:40Partydrinks & discussions

HTML Special, Thursday June 16th

A healthy serving of mixed HTML salad, with a side order of tag soup.

Your MC: Ruben Bos

Ruben Bos registered his first dot.com when he was 12 years old, and he has been obsessed with the web ever since. Former Creative Director at Mangrove, he recently made the big leap from agency work to teaching students at the Rotterdam University of Applied Sciences. With his own practice he keeps advising companies how to create the best digital UX. Clients he worked for range from start-ups to international organizations like the ICRC. Ruben regularly writes about UX design, web & app development and client work. In 2007 he published a book about webdesign aimed at clients of digital agencies. He has been a speaker at events like Appsterdam, Fronteers and SXSW interactive.

<a> — Vague but exciting

The world exploded into a whirling network of kinships, where everything pointed to everything else, everything explained everything else…

Enquire within upon everything.

Video

Jeremy Keith

Jeremy Keith lives in Brighton, England where he makes websites with the splendid design agency Clearleft. You may know him from such books as DOM Scripting, Bulletproof Ajax, and HTML5 For Web Designers: Return Of The Standards. He’s the curator of the Responsive Day Out conference, and he organised the world’s first Science Hack Day. He also made the website Huffduffer to allow people to make podcasts of found sounds—it’s like Instapaper for audio files. Jeremy spends most of his time goofing off on the internet, documenting his time-wasting on adactio.com, where he has been writing for over ten years.

<link>

Parsing HTML in order to load a full Web page is a complex process. On the one hand the browser needs to discover external resources as soon as possible. On the other hand, those same resources can in some cases block the browser's HTML parser, as they may change the eventual result. Over the years browsers have developed mechanisms to cope with that, to make sure resources are discovered even if the parser is blocked.

At the same time, the link element is used to signify a relation between the current page and other resources. It allows us to tell the browser that a certain page should be styled using a certain resource, has an RSS feed alternative, is likely to be followed by another page and much more.

In this talk we'll discuss the connection between these two seemingly separate subjects, and talk about a number of new link relations that enable us to improve the browser's resource discovery process, and get us faster loading Web pages.

Video

Yoav Weiss

Yoav Weiss does not get discouraged easily and is not afraid of code. He is a Web performance and browser internals specialist, especially interested in the intersection between Responsive Web Design and Web performance. He has implemented the various responsive images features in Blink and WebKit as part of the Responsive Images Community Group, and is currently working at Akamai, focused on making the Web platform faster. You can follow his rants on Twitter or take a peek at his latest prototypes on Github. When he's not writing code, he's probably slapping his bass, mowing the lawn in the French country-side or playing board games with the kids.

<layer>

Do you remember <layer>? If you do, you also remember Netscape 4, and probably not fondly. And if you remember Netscape 4 you also remember most of web history, as I do.

What is browsers' game? Why all the incompatibilities? And what about browser detects vs feature detects? We all know the second is superior to the first, but sometimes it just doesn't work.

In this session PPK is going to give a broad, historical overview of where we were, where we are, where we're going to, and why.

Video

Peter-Paul Koch

Peter-Paul Koch is a mobile platform strategist, browser researcher, consultant, and trainer in Amsterdam, the Netherlands. He specialises in the mobile web, and especially mobile browser research. On the Web he’s universally known as ppk. He won international renown with his browser compatibility research, founded Fronteers, the Dutch association of front-end professionals, and advises mobile and desktop browser vendors on their implementation of Web standards. Meanwhile he concentrates on the mobile web, and then especially on the aspects he feels web developers are ignoring, such as the UC browser and Xiaomi and Micromax devices. His personal collection consists of about 50 mobile phones, and he uses about half of them in his daily testing. Occasionally one of them emits a soft, melancholy beep, but he has no idea which one and studiously ignores it.

<source>

The <video>, <audio> and <picture> elements can all contain <source> elements. Should be straight-forward, you think? This little element may have more to tell than you think. What is the history? What were the design mistakes for <video> that we didn't want to repeat for <picture>? What is the processing model for <video> vs. <picture>? Why can't you use the media attribute for <video><source>? Why do double downloads happen? Why do people use conditional comments in their <picture>s? Why doesn't <source> with picturefill work on Android 2.3? Why is parsing the srcset attribute so complex and not just splitting on commas? Just how much can you do with this element? What are the future plans? Why are there so many questions? (Disclaimer: I might not have enough time to cover all of this!)

Video

Simon Pieters

Simon does quality assurance and Web standards work for Opera since 2007, and is editor of the HTML standard, WebVTT, CSSOM, Quirks Mode... He helped drive the specification for the picture element in the RICG. He writes and reviews cross-browser test cases in web-platform-tests. His main goal is interoperability; specs and tests are vehicles to that end. He hangs out in #whatwg and tweets at @zcorpan.

<noscript>

HTML is special. Unlike many other languages the browser won’t show an error message when you make a mistake. Sure, that makes it easy to write bad code, but it also allows HTML to be both backwards and future compatible. It allowed the HTML5 specification to extend the existing form field types. It allowed the RICG to create the <picture> element. And it forms the basis of Web Components because it makes custom elements possible. And most importantly, it allows the <noscript> tag, which by definition does absolutely nothing. This talk will explain the concepts behind graceful degradation, progressive enhancement and feature detection, and focus on how to solve practical problems with these concepts.

Video

Niels Leenheer

Niels is a self-professed browser geek. He has been hooked on browsers ever since somebody showed him the original Nexus browser on a NeXT Cube back in the dark ages of the internet. Niels is the creator of HTML5test.com and runs one of the largest Open Device Labs in the world. He loves procrastinating, collecting weird devices with even stranger browsers, procrastinating, researching obscure browsers and writing bug reports. For his day job he creates web applications for Salonhub.

<input>, I <3 you but you're bringing me down

Browsers have had an <input> element since the dawn of time, and yet any time you talk to web developers about it, everyone complains about it. It's unpredictable. It's grumpy. It's got reaaaaally strong opinions about style, and it doesn't want to listen to yours. I'm going to tell you a story about how <input> grew up to be the moody adult it is, and why it's maybe time we stood up to it.

Video

Monica Dinculescu

Monica is an emojineer at Google. She works on Chrome, web components and Polymer, and has probably at least once broken the Internet for you. She is unreasonably excited about emoji, and will likely eat all of your Oreos, if you have any.

<iframe>

Hate it or love it, the iframe is one of the most dynamic elements in the current html spec. All the popular websites will contain a few of them as they are used by the advertisement industry. But that's not its only purpose. Iframes have a wide variety of use cases and implementations. From form targets to sandboxes to websites-in-a-website to seamless pseudo-element to parallel processing to unblocked preloading to clickjacking. In my talk we'll dive deeper into what it's like to be an iframe. We'll look at what the spec has to say about them and how they are used in the wild. We'll try to figure out where the tag came from, where it is now, and what makes it so unique.

Video

Peter van der Zee

Peter is a JavaScript developer focusing on applications, architecture, tooling, and teaching. He works remotely as a contractor under the c80.nl label. He organizes a yearly code golfing competition called JS1k and likes to see magic minification tricks. He wrote a JavaScript parser and loves to dabble in the low level syntax world of source code. He also loves to play board and video games.

<html>

Everyone and their cat knows HTML. Sure, we all struggle deciding what’s the most semantic element for each case, but when it comes to functionality, there’s nothing more to learn. Right? Wrong. No matter how well you think you know HTML, this talk will prove to you that there’s still more to explore. Also that you probably use too much Javascript for things that don’t need it anymore. Prepare to be surprised at how many elements, attributes, even entire HTML-based technologies exist that you’ve never learned, and how they could be useful in your projects, today.

Video

Lea Verou

Lea is currently busy doing research in Human-Computer Interaction at MIT CSAIL. She has previously written an advanced CSS book for O’Reilly (CSS Secrets) and worked as a Developer Advocate at W3C. She has a long-standing passion for open web standards, and is one of the few Invited Experts in the CSS Working Group. Lea has also started several popular open source projects and web applications, such as Prism, Dabblet and -prefix-free and maintains a technical blog at lea.verou.me. Despite her academic pursuits in Computer Science, Lea is one of the few misfits who love code and design equally.

CSS Day, Friday June 17th

The fourth iteration of our stylish main course.

Your MC: Stephen Hay

Californian by birth and Dutchman by choice, Stephen is a designer, consultant and author of Responsive Design Workflow (New Riders, 2013) and contributing author to Smashing Book #3. He is a frequent speaker at industry events and has written for A List Apart and other industry publications, including his popular-but-sparingly-updated blog The Haystack. While spending an increasing amount of time leading workshops, writing, and speaking, Stephen still spends the majority of his time working with clients large and small through his consultancy, Zero Interface.

CSS for Software Engineers for CSS Developers

Depending on where you draw your measurements from, the first programming languages for use on ‘modern’ electric computers were designed in the ’40s and ’50s. CSS, on the other hand, is a mere adolescent—born in 1996, it’s just 18 years old. This means that software engineers have had over four decades’ head start on us: we should be listening to a lot more of what they have to say.

In this talk, we’ll take a look at some very traditional computer science and software engineering paradigms and how we can steal, bend, borrow, and reimplement them when writing our CSS. Writing CSS like software engineers so that we can become better CSS developers.

Video

Harry Roberts

With a client list including Google, the United Nations, and Unilever, Harry is an award-winning Consultant Front-end Architect who helps organisations and teams across the globe to plan, build, and maintain product-scale UIs. He writes on the subjects of CSS architecture, performance, and scalability at csswizardry.com; develops and maintains inuitcss; authored CSS Guidelines; and Tweets at @csswizardry.

On CSS accessibility and drinking tea

When the web was new, design and structure were all mixed up together. Eventually we realised this was very messy, so we invented CSS and separated design from HTML. Everyone felt much better after this, and went and had a cup of tea.

But while everyone was drinking tea (and not really paying attention), the line between design and structure began to get messy again. Things like the before/after pseudo-selectors made it possible for CSS to directly change content, and features like FlexBox push the concept of separation to breaking point. Conversely, CSS is being used as a development tool for visualising semantic information like role and state, when added to an interface using ARIA.

In this talk Léonie will look at the changing relationship between design and structure, and what it means for accessibility mechanics in the browser. She will share CSS code examples and design patterns for solving common accessibility problems, so everyone can go and have another nice cup of tea.

Video

Léonie Watson

Léonie Watson began using the internet in 1993, turned it into a web design career in 1997, and (despite losing her eyesight along the way) has been enjoying herself thoroughly ever since. She is a Senior Accessibility Engineer with The Paciello Group (TPG) and owner of LJWatson Consulting. Amongst other things she is co-chair of the W3C Web Platform Working Group, and a member of the ARIA and SVG working groups. In her spare time Léonie blogs on tink.uk, writes for Smashing magazine, SitePoint.com and Net magazine. She also loves cooking, dancing and drinking tequila (although not necessarily in that order).

Mediaqueryless Responsiveness

Media queries gave us the power to create responsive layouts that work on all kinds of screens: from small to huge. Without media queries the web would be much less flexible. But media queries are hard work. We have to decide when a breakpoint occurs, we have to decide how it looks at that breakpoint, and we have to write the code to make it so. Wouldn’t it be nice if we could simply tell the content to behave? To behave in a matter that makes sense, according to a set of rules, a system, we come up with. In other words: instead of crafting every possible layout by hand, wouldn’t it be better if we go home early and let the computer do the work for us?

It turns out that CSS gives us quite some tools to create super flexible, responsive layouts that don’t use media queries. Some are old, like floats and CSS columns. Some are newer, like flexbox and viewport relative units. And others existed for ages, we simply didn’t know they did yet.

Video

Vasilis van Gemert

Vasilis van Gemert is a lecturer at the Amsterdam University of Applied Sciences, where he teaches the next generation of digital product designers how to design things with the web as a material. Before he became a lecturer he worked as a principal front-end developer for large and small clients in The Netherlands. Today he only creates websites for himself. This not only means that he can use any new feature he wants, it also means he is able to investigate things that might not seem very interesting. Most of the time this turns out to be true.

Modern CSS and interactive email

Email has often been overlooked as simplistic, outdated and limited but with modern webkit based email clients accounting for over 60% of opens the possibilities have really opened up. The new age of email is a fully interactive experience based in modern CSS (with a solid fallback for Outlook).

Some of the things we've been seeing in recent emails include;

  • Tabbed layouts
  • Image galleries
  • Multiple pages
  • Price calculations
  • Analytics on interactions
  • Games
  • Live content
  • 3D CSS

We'll look over the code behind these whilst covering;

  • A brief overview of current CSS support in email clients
  • Detecting interaction with CSS
  • Basic interactions - The Checkbox Hack
  • Advanced interactions - Introduction to Punched Card Coding

Video

Mark Robbins

Mark is changing the way people think of email, they no longer have to be static pages of simple text and image but can now be fully interactive microsites. At the forefront of the new interactive email revolution he is pushing email clients to their limits yet still supplying solid fallbacks for the likes of Outlook. Among other things, he has build fully interactive game in email, multi page emails, 3D products and a fully functional shopping cart and checkout in an email. All this without a line of JavaScript, just pure CSS. Working at Rebelmail he has helped worked with a number of major brands and has consulted for a number of email clients on developing their rendering capabilities. You can often find him discussing the quirks of email rendering on twitter @M_J_Robbins and as a moderator at the Litmus Community.

CSS and SVG — The Dynamic Duo!

When deciding how to integrate graphical effects in your web design, it's easy to see CSS and SVG as competing options. But these two tools are better together. Static SVG images created by graphics software rarely use CSS, but a little CSS code can transform those SVG files into dynamic, interactive, and responsive graphics.

This session will introduce many of the ways CSS can be used to enhance SVG. It will start by outlining how CSS for SVG is similar and different from CSS for HTML, with some practical tips to avoid common difficulties. Then we will start having some fun:

  • applying CSS animations and transitions to SVG properties, what works now and what should be possible soon;
  • using CSS inheritance and re-usable SVG icons to create variations on a theme, with additional potential from CSS variables;
  • designing CSS media queries for SVG to consider how they interact with SVG view-box scaling in responsive designs;
  • defining filters, masks, and clip-paths in SVG code to apply as CSS effects to HTML.

It will be a rapid overview of the (many) possibilities, not a detailed tutorial. The discussion should be accessible to SVG beginners — assuming you know a thing or two about CSS! However, it will not be a general introduction to SVG, instead focusing on how you can adapt and enhance existing SVG code.

Video

Amelia Bellamy-Royds

Amelia Bellamy-Royds is a Renaissance girl, whose education and career have moved sideways from bioinformatics to government science policy to journalism to data visualization to web graphics. In web development circles, she is mostly known for her work with SVG. She is an Invited Expert on the W3C's SVG and ARIA working groups, and has co-authored multiple books on SVG from O’Reilly Media. One day, she hopes to put her web graphics skills to work making journalistic data visualizations to promote science-based decisions in government policy. For now, she's focused on improving graphical communication on the web for everyone.

The evolution of CSS4 Color

New in CSS4 Color: ICC profiles! CIE Lab! Rendering Intents! OK by new I mean the stuff that used to be in SVG2. Which used to be in SVG Print. Which used to be in (well you get the idea). Why has color management taken so long to get going on the Web? Isn't it kind of esoteric and specialized - what does it do for you, in practical terms? What, in fact, is color anyway - isn't it kind of subjective?

After attending this talk you will understand that color is a measurable, reproducible sensation; standardized since 1931! You will get white point adaptation (you already know this, you maybe just don't know the term). You will understand Lab color space, be comfortable with gamut volume plots, and be able to laugh at snake-oil claims about color gamut coverage in advertising. You will be really looking forward to seeing CSS4 Color implemented in all the browsers (and the HTML/CSS to PDF converters). And just maybe, you will be kinda pissed we had to wait this long to get what print media has taken for granted for decades, now.

If you go out and buy a wide-gamut, calibrated monitor after this, I disclaim all responsibility :)

Video

Chris Lilley

Chris Lilley is a Technical Director at the World Wide Web Consortium (W3C). Considered “the father of SVG”, he also co-authored PNG, was co-editor of CSS2, chaired the group that developed @font-face, and co-developed WOFF. For three years he was a member of the W3C Technical Architecture Group. Co-editor of CSS3 Color and CSS4 Color, Chris is still trying to get Color Management on the Web, sigh. Currently working on CSS levels 3/4/5 (no, really), Web Audio, and WOFF2.

Braces to boxes, making sense of layout

CSS, it almost feels like magic at times; doesn't it? Well, in order to remove some of that magic let's take a look at the engine and how it handles converting your CSS into the layout of your site.

Video

Greg Whitworth

Greg Whitworth is on the Layout team of Microsoft Edge and an avid advocate of enriching the web platform to empower web developers. He is a member of the W3C CSS Working Group, the CSS Houdini Task Force. He really enjoys trying to go after interop between web browsers in hopes of making the amazing experiences that web developers create, just work for their users. Prior to working with Microsoft, he was a full time web developer for over a decade working on small/medium sites and web applications.

Practical Blend Modes

With the availability of SVG and CSS filters and blend modes, our browsers have become very powerful image rendering engines. From creating faux surrealist infrared effects to 3-d images, the artistic possibilities are endless. But what about some practical use cases for filters and blend modes? How can we use them in our every day user interfaces to improve performance and aid in design? This talk will cover just that, and show some practical examples of using filters and blend modes.

Video

Una Kravets

Una is a front-end developer on the Cloud Platform team within IBM Design in Austin, TX. She writes technical articles around the web and on her website una.im, is a Sass community organizer, and cohosts the Toolsday podcast. Una frequently contributes to the open source community, being a core member of the Open Design Foundation and creator of CSSgram.

All attendees, 356 in total
Name Company Twitter Days From
Adam Havel Heureka Shopping Both CZ
Adam Marchbanks Both NL
Adriaan Snoeren CM Groep @adriaansnoeren Both NL
Adriaan Zwiers AdriaanTV @AdriaanTV Friday NL
Aina Requena Lafuente Exozet Berlin @ainarela Both DE
Albert de Klein Amsterdam University of Applied Sciences @lbrt Thursday NL
Alena Svirid Colours Both NL
Alex Hadik IBM Design Both US
Alex Robinson Solidgoldpig @solidgoldpig Both UK
Alice de Mauro TMG Both NL
Amelia Bellamy-Royds @ameliasbrain Both CA
Andra Voinea Endouble Friday NL
Andre Knott StockdaleMartin Both UK
Andrea Verlicchi YOOX Net-a-Porter Group @verlok Both IT
Andrew Dyton @andyvidual Both UK
Angela Sjöholm Trifacta Both DE
Anna Migas Lunar Logic @szynszyliszys Both PL
Anneke Sinnema Anneke Sinnema Websites | Teksten en Advies @asinnema Both NL
Aoife Carrigan Isobar Ireland @aoifecarrigan Friday IE
Arien de Groot SIMgroep @ariendegroot Both NL
Arnold Schuitema ABF Research Friday NL
Arnoud Lagcher SIMgroep Both NL
Asgeir Hølleland Knowit Both NO
Aukje Wielens Redhotminute Friday NL
Ayoub Abid cyber:con Both DE
Barretto Bruno Storyful Both IE
Bart de Rijk Adyen Friday NL
Bas Grootjans ABF Research Thursday NL
Bas Kuijf Eagerly Internet Friday NL
Ben Cavens Think Tomorrow @BenCavens Thursday BE
Benjamin Olry cyber:con Both DE
Benjamin Pauer Jimdo @BenjaminPauer Both DE
Bernardo Baquero Stand TMG @berbaquero Both NL
Bert Bos W3C Friday FR
Bert Pardaens De Persgroep Publishing Both BE
Bjoern Prenger getit Both DE
Bogdan Dumitrescu sprd.net Both DE
Bram Gotink KBC Group Both BE
Bram Smulders Colours Both NL
Bramus Van Damme Small Town Heroes @bramus Both BE
Bruno Coen ADNEOM Both BE
Bryan de Souza Wagemaker Redhotminute Friday NL
Bryan Scheele Hamaka @haamaakaa Friday NL
Bryant Chou Webflow @bryantchou Both US
Cedric Lesne Cerebe @cerebe Both BE
Chris Asteriou Digital Bliss @digitalblissltd Both UK
Chris Lilley W3C @svgeesus Both US
Christer Janzon Funka Nu Both SE
Christiaan Laarman Coolblue Both NL
Christiaan Tigelaar Sitemind @ctigelaar Friday NL
Christoph Haupt Exozet Berlin Both DE
Chrit Kessels Fontys Hogescholen Both NL
Chun Wong Burst Thursday NL
Claudia Hernandez @koste4 Both FR
Claudia Stegmaier Aperto Both DE
Clemens Schotte Microsoft @cschotte Both NL
Coen de Zeeuw Alientrick Media Creators Both NL
Daan Schaeffer Friday NL
Dan Both UK
Daniel Fornells Sunweb / Sundio Group @danifornells Both ES
Daniel Niemann EVENTIM Both DE
Danny Kroon ABF Research Friday NL
Darice de Cuba Hogeschool Rotterdam @Darice Friday NL
Dario Fuzinato Aperto Both DE
Darko Rajin tecRacer Both DE
Darya Nazemnova Game Stream Both BY
Dave Aarts Evident Thursday NL
David Knowles XS4ALL Both NL
David Šanda Heureka Shopping @DazixCZ Both CZ
Dennis Frank @freshmango Both DE
Dennis Heibült @csshugs Both DE
Dirk Pennings Redhotminute @dirkdotme Thursday NL
Dirk Voß aixigo Both DE
Dominique van Gimst LimoenGroen Both NL
Drewes Bos Indivirtual Both NL
Eddie Gieze Objectif Lune Both NL
Elger van Boxtel Planon @elgervb Both NL
Emil Björklund inUse Experience @Thatemil Both SE
Enis Baruh Bitmama @enisb Both IT
Eric Peeters Redhotminute Thursday NL
Erwin Goossen Justlease.nl @navelpluisje_nl Both NL
Evert Slagter 1020concepts @evertslagter Both NL
Feike Geerts Bol.com Friday NL
Ferry van Ommen Redhotminute Thursday NL
Flemming Lauritzen Knowit Both NO
Fleur de Kroon Redhotminute Thursday NL
Florian Uhlig Team Neusta @f_uhlig Both DE
Frank Baus Ergosign Both DE
Frank Verkade QDelft Both NL
Frank Weima Béyonit Both NL
Freek Bron Elephant @FreekBron Friday NL
George Tsimenis Mediamonks Friday NL
Gerjan Kempkens ISAAC Both NL
Graham May Soapbox Friday UK
Greg Whitworth Microsoft @gregwhitworth Both US
Grygorii Polinovskyi Mobility Media @polinovskyi Both DE
Haico Heemstra Ahold @haicoh Both NL
Hans Grimm Grimm.nl @grimmweb Both NL
Harry Roberts @csswizardry Both UK
Henk Jan Bouwmeester Ahold @hetgelaat Both NL
Hidde de Vries hiddedevries.nl @hdv Both UK
Hielke van Geelen Béyonit Both NL
Hing Li ABF Research Thursday NL
Holger Gehrmann holger gehrmann it-beratung Both DE
Hrvoje Golčić milch & zucker Both DE
Humberto Barrientos Gonzalez CM Groep @isejaa Both NL
Ibe Garritsen a&m impact internetdiensten @IbeGarritsen Both NL
Ingrid Arcas Gemini @iarcas Friday NL
Ingrid van de Bovenkamp Mediacollege Amsterdam Both NL
Ira Varshavets Friday PL
Jacco van der Plas Voebal International @PtjZ Both NL
Jack Vermeulen Isatis Health Friday NL
Jacomien Kodde Informaat Friday NL
Jacqueline Lievense CIG Both NL
Jakub Płoskonka Allani @j_ploskonka Both PL
Jan Enning Kleinejan.org Both NL
Jan Jaap van Deursen Endouble Both NL
Jan Lemmens Amplexor Thursday BE
Jan van Hellemond Frontlab @jvhellemond Both NL
Janita Top @sigvi Both NL
Jannie Breij Friday NL
Jarno van Rhijn 42 Both NL
Jarosław Cielebąk Unit4 Both NL
Jasper Zuyderwijk Mediamonks Friday NL
Jelle Sjollema Mediacollege Amsterdam @djsjollema Both NL
Jeremy Keith Clearleft @adactio Both UK
Jeroen Stengs PB Web Media @Bhalial Both NL
Jeroen Trotz Event Engineers @eventwifi Both NL
Jeroen Visschers Redhotminute Thursday NL
Jesse van Leth Microsoft @jessevl Both NL
Jessica Keith @wordridden Both UK
Jewwy Qadri WebArchitects @jewwyq Both NL
Job van Achterberg 3ode @detonite Both NL
Jochem Bronzewijker Hamaka @haamaakaa Friday NL
Jochem Keller Elephant @jochemkeller Friday NL
Jochem Nabuurs Jaffiro @jochemnabuurs Both NL
Joe Cramer Drew London @joeaycramer Thursday UK
Johan Smits Saxion Both NL
John Beitler Coffee Media @coffeemedia Friday NL
Johnny Berkmans Think Tomorrow @KingJohnny Thursday BE
Jonatan Rueda Unit4 Both NL
Jonathan Ströbele pbi planungsbüro @stroebjo Both DE
Joost Klein Schiphorst PB Web Media Both NL
Joost Schermers PGGM Both NL
Jordi Veenvliet Orange Juice Friday NL
Joris Compernol Euricom Friday BE
Joris von Loghausen NewsMedia @vonloghausen Both NL
Josh Barr Both NZ
Judith Köthnig Hjaltelin Stahl Direct @_halefa_ Friday DK
Julia Jacobs Lunar Logic @jul_jacobs Both PL
Julian Pineda Both CA
Julian Schoemaker E.M.P. Merchandising Handelsgesellschaft Both DE
Julie Vanopdenbosch 2dotstwice Both BE
Justin Roos Mediamoose @jstnrs Both NL
Kaj Rietberg Zorgweb @Kajrietberg Both NL
Kamila Zborowska TOPdesk Both NL
Karl Ludwig Weise @karlludwigweise Friday DE
Kevin Kluijtmans Geodan Both NL
Kim Boender Superlatief Friday NL
Koen Haarbosch Redhotminute Thursday NL
Koen Peters ISAAC Friday NL
Konah Weisel OnDeck Capital Both US
Krijn Hoetmer Qontent @krijnhoetmer Both NL
Kristof Kreimeyer getit Both DE
Krzysztof Różycki 10Clouds Both PL
Lara Anabel López NLHTML5 @laraanabel Friday NL
Lars van Galen Lobbes Both NL
Lasse Diercks Jimdo @lassediercks Both DE
Laura Arnedo NBQ Technology Both ES
Lea Verou @LeaVerou Both US
Levi Camijn Mediamoose @levicamijn Both NL
Lewi Hussey Orange Juice @Lewitje Friday NL
Lorenzo Migliorero Triplesense Reply Both IT
Luca Morandi Entopic Both NL
Lucia Dossin PublishingLab Both NL
Lucien Immink ISAAC Both NL
Lutz Möbius Aperto Both DE
Luuk Lamers dimcoppen online @xaddict Both NL
Léonie Watson The Paciello Group @leoniewatson Both UK
Maarten Schroeven KBC Group Both BE
Machiel Hulsbosch QForma @mphulsbosch Both NL
Madeleine Villavicencio @heymadyv Both US
Mallory van Achterberg @stommepoes Friday NL
Manuel Lieb Koch Kommunikation @skinwalk3r Both CH
Marc Bruisten Momkai Friday NL
Marc Stalfoort Enrise @mstalfoort Both NL
Marc van Duivenvoorde PB Web Media Both NL
Marco Leuwer cyber:con Both DE
Marco Prins Bol.com Friday NL
Mareike Huetter MRM//McCann Both DE
Marije Onrust Bol.com Thursday NL
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Mark Feenstra Synetic Friday NL
Mark Robbins Rebelmail @m_j_robbins Both UK
Mark van Egmond WebArchitects @markvegmond Friday NL
Marlou Scholten Alientrick Media Creators Both NL
Martijn Boeve Redhotminute Friday NL
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Martijn Nieuwenhuizen @MtNieuwenhuizen Both NL
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Martijn van Duuren @Martijnvduuren Both NL
Martijn van Turnhout CM Groep @MvanTurnhout Both NL
Martin de Rooij TOPdesk Both NL
Martin Di Martino-Marriott Linney Group @MartinoNotts Both UK
Martin Hagedoorn Adyen Thursday NL
Mathias Bynens Opera @mathias Thursday BE
Matthias Beitl @cssence Both AT
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Michael Hastrich 72/300 @mchaste Friday NL
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Michiel de Jong Bol.com Both NL
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Milly Uylenbroek Eagerly Internet Friday NL
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Monica Dinculescu Google @notwaldorf Both US
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Nick Spong Adyen Thursday NL
Nick Verheye BinckBank Both BE
Nicolai Steinel Taikonauten Both DE
Niek Weevers a&m impact internetdiensten @nweevers Both NL
Niels Leenheer @html5test Both NL
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Niki Meredith Isobar Ireland @nikimere Friday IE
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Nikolai Grothaus cyber:con @n1kog Both DE
Niles Brandon Both US
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Patrick Wong Sunweb / Sundio Group Both NL
Paul Lloyd @paulrobertlloyd Both UK
Paul van Buchem Endouble Both NL
Paul van Buuren WBVB Rotterdam @paulvanbuuren Both NL
Paul Verbeek NLHTML5 @_paulverbeek Thursday NL
Peter Bösenberg tecRacer @pboesenberg Both DE
Peter Garama Burst @pgarama Friday NL
Peter van der Zee c80.nl @kuvos Both NL
Peter Wulf Tevreden.nl Both NL
Peter-Paul Koch QuirksMode.org @ppk Both NL
Petra Schanz Both DE
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Quint Wapenaar Growing Minds @QuintWapenaar Friday NL
Rachel Andrew @rachelandrew Both UK
Rafael Lyra Werkspot Thursday NL
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Rene Drieenhuizen Mediamonks @ReneDrie Friday NL
Ricco Arntz Mediamonks Friday NL
Richard van der Pol Redhotminute Friday NL
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Robert van der Elst Rietveld Licht & Wonen @rvanderelst Both NL
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Rodney Rehm medialize @rodneyrehm Both DE
Roelant Cornelissen Valk Solutions Thursday NL
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Roland Franke Bol.com @rolandfranke Both NL
Roland Kedde Endouble Both NL
Ronald van der Horst ISAAC @ronaldvderhorst Thursday NL
Ronald Wesselink KRO-NCRV Friday NL
Rosmerta Goei Mediacollege Amsterdam @rosmerta_goei Both NL
Rowdy Rabouw double-R webdevelopment @rowdyrabouw Both NL
Roël van Dijk Burst @roeltekoel Thursday NL
Ruben Bos @rubenbos Both NL
Ruben Nascimento Momkai @bzin Both NL
Ruud Fortuin ISAAC Both NL
Sabrina Handt E.M.P. Merchandising Handelsgesellschaft Both DE
Sander van Scheepen Hamaka @haamaakaa Friday NL
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Sanne Veroude De Voorhoede @SanneVeroude Both NL
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Sergie Magdalin Webflow @thesergie Both US
Sergio Lavanga Koch Kommunikation @koch_k Both CH
Sharon Irish The List Both UK
Sheila Brugman Valk Solutions Both NL
Shubhojyoti Bhattacharya @boomboomshubho Both IN
Simon Koch Cybercon Both DE
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Simon Rood Adyen @Trigalti Friday NL
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Stefan Limke IT Beratung Both DE
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Stefanie Laharnar Spoonflower @lhtdesignde Both DE
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Steven Oosterbeek Superlatief Friday NL
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Stijn De Prijck CM Groep Both NL
Stijn Hallet Amplexor @galli_10 Thursday BE
Stuart Brockwell Soapbox @stueybrock Friday UK
Stuart Robson @sturobson Both UK
Sumita Bhattacharya @sumidumi Both IN
Sven Ridder Aperto Both DE
Teun van Heerebeek The Concept Store Both NL
Theo den Blanken Mediacollege Amsterdam Both NL
Thijs Busser Redhotminute Both NL
Thijs Reijgersberg Werkspot @ysbreker Both NL
Thomas de Vries Evident Friday NL
Thomas Dobber Adyen Friday NL
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Tim Bovelander Bol.com Friday NL
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Timothy Malabuyo Google @malabooboo Both UK
Tino van Duuren Redhotminute Friday NL
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Tom Hartwig Indivirtual @tmhrtwg Both NL
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Ulf Walter-Laufs trivago @jmulfiw Both DE
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Volker Fricke BLITZEN @qpain Both DE
Wart Claes Euricom Friday BE
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Yoav Weiss Akamai @yoavweiss Both FR
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Zoe Mickley Gillenwater Booking.com @zomigi Thursday NL