A Microsoft Team Foundational Server developer designs, develops, tests, and maintains software applications on Microsoft's Team Foundation Server (TFS). They are involved in creating and managing source code repositories, configuring build and release pipelines, and automating testing processes. They also handle version control, work item tracking, and reporting services, ensuring seamless integration and functionality. The developer collaboratively works with other team members, such as software engineers and project managers, to deliver high-quality software products. Additionally, they address any server-related issues, troubleshoot problems, and provide technical support, thereby ensuring smooth and efficient workflow.