Front-end and back-end developer and performance tuning.
Take care about website security bugs.
Choosing and designing the whole website/web service/api system.
Javascript, jQuery, Node.js PHP, Redis, MongoDB MySQL... performance explain!
Can work with both raw and framework of PHP and Javascript. Javascript serverside by using node.js, realtime technology from Node.js too.
Can Install and mantain web server for running PHP by CentOS, Ubuntu...