The Data Engineer III position at Amazon.com Services LLC involves designing, developing, implementing, testing, documenting, and operating large-scale, high-volume, high-performance data structures for business intelligence analytics. The role requires implementing data structures using best practices in data modeling, ETL/ELT processes, SQL, Oracle, and OLAP technologies. Responsibilities include providing online reporting and analysis using OBIEE business intelligence tools, gathering business and functional requirements, and translating these into robust, scalable solutions. The position also involves analyzing source data systems, participating in the full development life cycle, producing comprehensive dataset documentation, and mentoring junior data engineers.