Proficient understanding of web markup, including HTML5, CSS3
Basic understanding of server-side CSS pre-processing platforms, such as LESS and SASS
Proficient understanding of cross-browser compatibility issues and ways to work around them.
Must have knowledge of pixel perfect layout.
Must have knowledge of Responsive for all devices.
Also, Good knowledge of WordPress, Magento, CI and any other PHP framework theming.
Good understanding of asynchronous request handling, partial page updates, and AJAX
Basic knowledge of image authoring tools, to be able to crop, resize, or slicing. Familiarity with tools such as Gimp or Photoshop or illustrator is a plus.
Proficient understanding of code versioning tools, such as Git & SVN.
Good understanding of SEO principles and all meta tag for SEO.