A Hyperion Financial Management (HFM) developer specializes in designing, developing, and maintaining applications using Oracle's HFM tool. They work on creating financial consolidation models, ensuring data accuracy, and enabling efficient financial reporting. They manage metadata, build rules files, and troubleshoot issues. Their role often involves liaising with business stakeholders to understand requirements, translating these into technical specifications, and ensuring the system aligns with business objectives. They also train end-users, provide support, and may be involved in performance tuning. Their goal is to optimize the use of HFM for financial management and decision-making.