As serverless architectures become more popular, customers need a framework of patterns to help them to identify how to leverage AWS to deploy their workloads without managing servers or operating systems. In this session, we describe reusable serverless patterns while considering costs. For each pattern, we provide operational, security, and reliability best practices and discuss potential challenges. We also demonstrate the implementation of some of the patterns in a reference solution. This session can help you recognize services and applications for serverless architectures in your own organization and understand areas of potential savings and increased agility and reliability.