A Jekyll developer designs, builds, and maintains static websites or blogs using Jekyll, a simple, blog-aware, static site generator. They convert raw text files in various formats into a ready-to-publish website, often using Markdown and Liquid templating language. They use Jekyll's functionalities to create themes, pages, posts, and collections. They also manage data files to facilitate site customization and content management. Furthermore, they integrate plugins for additional capabilities and deploy the site using GitHub Pages or other platforms. Their work involves a lot of coding, problem-solving, and creativity to create efficient, user-friendly, and visually appealing websites.