A Front-End Developer is responsible for developing new user-facing features, determining the structure and design of web pages, building reusable codes, optimizing page loading times, and using a variety of markup languages to create the web pages. Responsive Web Design: Front end developers must be skilled in creating responsive layouts that adapt seamlessly to various screen sizes and devices, including mobile phones, tablets, and desktops. CSS Preprocessors: Familiarity with CSS preprocessors like SASS or LESS enhances CSS maintainability and organization.