In Financial Services, payments have evolved from a commodity into a key differentiator, driven by customer demand for faster, easier, and more seamless payment processing. Expectations from regulators for PCI DSS-compliant workloads have evolved with increased focus on risk reduction, transparency, and standardization. In this space, the need to replace legacy systems, address security concerns, and support a highly seasonal 24/7/365 operation present barriers to innovation. In this chalk talk, we examine how our customers address these concerns by using the AWS Cloud to rapidly build their own scalable payment systems, leveraging PCI DSS-compliant AWS services across compute, database, analytics, and security. Together, we explore traditional design patterns based on our PCI DSS Quick Start, as well as the evolution to managed services, microservices, and serverless services.