DynamoDB is easy to adopt, but as data and traffic grow, you inevitably face problems like hot partitions, GSI backpressure, and large-scale migrations. This meetup shares stories of actually experiencing and solving these problems. From restructuring a live table of 2 billion records without downtime, to a queue architecture case study that absorbs 10 million concurrent connections, to troubleshooting and decision-making processes outside of slides, we will share practical details from the perspective of practitioners. This event is recommended for backend engineers dealing with large-scale traffic and data with DynamoDB, those who have experienced or are considering hot partitions, traffic surges, or large-scale migration issues, and those curious about troubleshooting cases in actual operating environments, not just theory. The event is free, and 60 participants will be selected by lottery due to office space limitations. Participants will be notified by email and text after the recruitment deadline on August 21st.