Originally, Peter-Paul Koch is a front-end programmer who has specialized in browser incompatibilities, particularly of mobile browsers. His site quirksmode.org is universally known among front-end programmers and browser vendors. He advised Google, Microsoft, Mozilla, Samsung and BlackBerry on browser compatibility issues.
He has been speaking since 2006; among others at SxSW, Mobile World Congress, An Event Apart, BlackBerry DevCon, Samsung events as well as many specialised front-end conferences.
Peter-Paul Koch at Mobile Viewport, San Francisco – ‘A Pixel is Not a Pixel: Learn about Viewports’: