A Hyperion Business Intelligence developer designs, develops, and maintains Hyperion applications to support business data analysis and reporting needs. They collaborate with stakeholders to understand business requirements, translate them into technical specifications, and develop BI solutions. They configure and optimize Hyperion systems, troubleshoot issues, and ensure data accuracy and integrity. Additionally, they create and manage data models, develop dashboards and reports, and provide user training. They also work on performance tuning of Hyperion applications and databases. Their role is crucial in enabling data-driven decision-making in an organization.