A Gulp Automation Developer uses the Gulp.js toolkit to automate time-consuming tasks in the development workflow. They write scripts to automate processes like minifying and compiling code, running tests, and reloading browsers. They also manage dependencies, improve performance by reducing file size, and ensure that all components work together smoothly. They are responsible for streamlining and simplifying the development process, reducing errors and enhancing efficiency. Additionally, they may collaborate with other developers, sharing knowledge and resolving issues related to the automation process. Their work significantly enhances productivity in the software development lifecycle.