A UX/UI developer, must be able to write agnostic code for operating systems, browsers, and devices. Interdisciplinary skills, including psychology and human factors, are very important for developers to understand the audience that will use the product and how the product will be used. Customers want access to specific information quickly, without the hassle of excessive clicking to dig down and search. Skill-set include the design of user interface (UI) and user experience (UX), CSS, JavaScript, HTML, and a growing collection of UI frameworks.