A Microsoft Visual Studio developer designs, codes, tests, and debugs software applications using the Visual Studio integrated development environment (IDE). They leverage Visual Studio's features to write, execute, and debug codes in various languages like C#, C++, and Visual Basic. They manage database schemas, develop web services, and create user interfaces. Developers utilize Visual Studio's tools to enhance code quality, automate tasks, and increase productivity. They collaborate with teams in software design, participate in code reviews, and troubleshoot issues. They also use the platform's testing tools to ensure application functionality, security, and performance.