By hiring with me, you get the person, who will make design that "sells", so you will improve conversion, and have good user interface. I am sure, that designer, that doesn't work with HTML/CSS , can not make the design without issues, and his design will not be good with real data. So I am HTML/CSS developer. I do responsive HTML/CSS, and usually use SASS/LESS, Twitter Bootstrap, ZURB Foundation. I set requirement - code must be clean, w3c valid, pixel perfect, and Responsive for mobile devices. I have skills in twig engine, because I usually work with Symfony 2 developer team, and I have a good knowledge of WordPress. Working with me will be easy, so don't hesitate to contact me.