Proficient understanding of web markup, including HTML5, CSS3
Basic understanding of server-side CSS pre-processing platforms
Basic knowledge of image authoring tools, to be able to crop, resize, or perform small adjustments on an image. Familiarity with tools such as Gimp or Photoshop is a plus.
Proficient understanding of cross-browser compatibility issues and ways to work around them.
Proficient understanding of code versioning tools
Good understanding of SEO principles and ensuring that application will adhere to them.