An HTML developer, sometimes called a web developer, has a wealth of coding knowledge and the ability to create websites for a variety of business or client needs. As an HTML developer, your daily job duties include managing web projects, constructing websites for clients by writing code, developing applications, performing quality control tests, implementing custom features, and providing technical support as needed. You must be knowledgeable about and have experience with coding languages such as HTML and CSS. Other skills necessary for a career as an HTML developer include teamwork, strong communication, and time management.