A Microsoft Infrastructure Developer is responsible for designing, implementing, and managing the infrastructure of Microsoft-based systems. They work with various Microsoft technologies such as Azure, .NET, SQL Server, SharePoint, etc. Their tasks include creating and configuring servers, managing system updates, ensuring system security and compliance, troubleshooting technical issues, and optimizing system performance. They also collaborate with other IT professionals to integrate systems, automate processes, and improve infrastructure efficiency. Additionally, they need to stay updated with the latest Microsoft technologies and best practices. Their goal is to ensure a robust, secure, and efficient Microsoft infrastructure.