A Frontend Developer is responsible for creating and implementing visual and interactive elements that users engage with in a web application. They use a variety of programming languages such as HTML, CSS, and JavaScript to design, build and enhance websites. They work closely with UI/UX designers to translate design visions into reality, ensuring that the website's interface is optimized for user navigation. They also conduct website testing, troubleshoot any issues, and maintain the software documentation. Furthermore, they need to stay updated with the latest trends in web development and user experience designs.