Amazon DynamoDB is a hyperscale, NoSQL database designed for internet-scale applications, such as serverless web apps, mobile backends, and microservices. DynamoDB provides developers with the security, availability, durability, performance, and manageability they need to run mission-critical workloads at extreme scale. In this session, we dive deep into the underpinnings of DynamoDB and how we run a fully managed, nonrelational database service that is used by more than 100,000 customers. We look under the hood of DynamoDB and discuss how features such as DynamoDB Streams, ACID transactions, continuous backups, point-in-time recovery (PITR), and global tables work @scale. We also share some of our key learnings in building a highly durable, highly scalable, and highly available key-value store that you can apply when building your large-scale systems.