Deciding and implementing how websites look and work. Specific skills I have are design-tools-of-choice, HTML, CSS, and light JavaScript. Back end work and working with languages specific to the web, like PHP, ASP, Ruby, Python, etc. Medium skill in database/server work, medium skill in JavaScript, light skill in HTML. This is very different from a Front End Developer as there is little working with the design and heavier on programming concepts and concerns, like security and structure.