A Maven developer manages and streamlines the entire lifecycle of a project, from compiling source code to packaging and deploying applications. They automate the build process, ensuring consistency and quality control. Maven developers also manage project dependencies, reducing conflicts and ensuring compatibility. They document projects, making it easier for other developers to understand and contribute to the project. They may also set up and manage repositories to store project artifacts. Moreover, they often work with other development tools, integrating Maven into broader toolchains to further enhance efficiency and productivity.