A Brackets developer works with Adobe's open-source text editor, Brackets, designed for web development. They build, test, and debug web applications using HTML, CSS, and JavaScript within the Brackets environment. As it's open-source, they also contribute to the development and enhancement of the Brackets tool itself, fixing bugs and adding new features. They take advantage of Brackets' live preview feature for real-time changes, and its preprocessor support to use LESS and SCSS. They also utilize and create extensions for added functionalities. Their role involves staying updated with the latest web technologies and ensuring compatibility with different platforms.