An Analysis Services developer is responsible for designing, implementing and maintaining SQL Server Analysis Services (SSAS) databases. They develop multidimensional databases (cubes) and create complex MDX queries for data retrieval. Additionally, they utilize data mining techniques to identify trends and patterns, and develop business intelligence reports using tools like Power BI. Their duties also include troubleshooting and optimizing SSAS solutions, ensuring data integrity, and collaborating with other team members to integrate SSAS with other systems. Ultimately, their role is to help organizations understand their data better and make informed decisions based on that data.