Yes i m well know about W3C .
and also I have good knowledge of Mobile Jquery,WordPress,Codeigniter, php,Ajax,HTML5,CSS3,mysql,PDO SQl,Bootstrap, All Browser and Mobile Responsive Design,Payment Gateways(Paypal,Credit),SMS and call apis.
Please check my profile.
i m here for long term too i m full time developer.
Thank you
Shweta