This case study documents Itaú Unibanco's migration of legacy applications from an on-premise data center to Amazon EC2 instances powered by Intel® Xeon® processors. The objective of this migration was to enhance the bank's operational efficiency, reduce costs, and improve the customer experience. Prior to the migration, updating the bank's mobile application took several months; however, post-migration, updates can be completed in as little as one day. The transition allowed Itaú Unibanco to serve over 70 million customers more effectively, demonstrating improved scalability and responsiveness. The study outlines the collaboration between Itaú Unibanco, Amazon, and Intel in evaluating applications and workloads to determine the optimal hosting environment. It also highlights the significant reduction in platform delivery lead time from 120 days to one day, showcasing a 99% improvement. Additionally, the migration ensured compliance with security standards such as NIST and ISO 27001, further enhancing the bank's operational capabilities.