Extensive experience and knowledge of PHP, JS and HTML separately and apply both at the same time. From write optimized code (under high load sites) and also know how to do SEO of a website pages. Know and own all related areas - paint banners (static and dynamic GIF, Flash & , HTML5), internal linking of pages, promotion on key words, etc. In my portfolio - it is specified the sites on which I've done from scratch and turn-key all of the above personally. Price low, because we need another good opinion. The quality, clarity of task execution and efficiency is guaranteed.