More than 4 years experience with open source, I have been involved and completed a lot of projects with the CMS (Joomla, Wordpress, Magento, Drupal, Zencart, Prestashop, Codeigniter) html, css, ajax and web design.
With CMS:
+ Install and config the project.
+ Build whole site: get idea from you then create graphics or get graphics which you have already then build the site.
+ Migrate & Upgrade.
+ Extension (component, module, plugin, template): customise and create new extension with MVC.