You must be good at HTML CSS and Javascript. At least have experienced build some up-to-standard front-end websites especially for the company websites.
May required you to be proficient in some CSS or Javascript framework, like Bootstrap, jQuery, some CSS preprocessor SASS/LESS and some builder tools like NodeJS webpack or Gulp/Grunt. Understanding in responsive design as well as Git tool for vision control are important too for making work flow and work delivery to your client.
