Gauthier is a Belgian UI designer. He also have expertise in front-end development. You'll find some of his last works on his Dribbble page. Also, he regularly shares contents about design & code on his twitter account.
Today, being a designer is about much more than drawing beautiful interfaces in Photoshop or Fireworks. To properly design a website or application, a UI designer must understand the technology with which their products will be built; therefore, they must have a minimum set of front-end development skills. The World Wide Web is not static. Quite the opposite: It’s responsive, fluid, evolving and ever changing.
Web designers need to be familiar with HTML and CSS code and front-end technologies when they conceive a website or application’s interface. It might be of no real interest to some of you, but it could add some precious assets to your range of skills.