1. The candidate should know an MVC & core PHP and related framework, any would do such as (Codeigniter,Laravel)
2. Knowledge on CMS like WordPress, Magento, Joomla is an added advantage.
3. Wordpress custom plugin development is an added bonus
Experience with PHP 5.2.x and 5.3.x and latest
Experience with Magento/Joomla/Wordpress/Drupal including custom module development, and features module.
Experience with Magento eCommerce Community and Enterprise editions versions 1.5-1.7+