A Migration to developer is responsible for transferring a company's data, applications, and services from on-premise or other cloud platforms to Microsoft's cloud environment. They assess the existing infrastructure, plan the migration strategy, and execute it while minimizing downtime. Their tasks include migrating emails, calendars, contacts, and files, ensuring data integrity and security. They also develop custom solutions and integrations using APIs, PowerShell scripting, and .NET framework. Additionally, they troubleshoot issues and provide post-migration support. They collaborate with stakeholders to ensure the new environment meets business needs and complies with industry standards.