In this AWS re:Invent 2022 session, Michael Beardsley from the AWS SaaS Factory team delves into building SaaS microservices with a focus on simplifying multi-tenant development. He explores key concepts like tiering, data isolation, consumption-based pricing, and identity management in SaaS architectures. Beardsley demonstrates how to implement tenant context, runtime security policies, and reusable patterns to enhance developer productivity while addressing the complexities of multi-tenancy. The talk covers practical code examples and best practices for encapsulating SaaS-specific logic, managing tenant data access, and leveraging AWS services for secure and scalable SaaS solutions.