My expertise include
Server side: Symfony2, Node.js.
Client side: AngularJS, Backbone.js, CoffeeScript, HTML5, CSS3, Twitter Bootstrap, jQuery.
Database: MySQL, Doctrine ORM, Cassandra, MongoDB, PostgreSQL.
Performance: Amazon Web Services, AWS EC2, Google App Engine, CDN, Sphinx, Memcached, Nginx.
CMS: WordPress (Wordpress VIP), Magento.
Mobile software: iOS, Android, PhoneGap.
Auxiliary tools: GIT, Grunt, Sass/Compass, Jade, Google Tag Manager, Capistrano.
Analytics: Google Analytics, Optimizely, Sailthru.