Changing wheels while driving - how to make online migrations at scale?

Migrations are an inevitable step in your product lifecycle. Whether you want to scale up your product, add a shiny new feature, or refactor your code—you might find yourself blocked by the way your code & data are structured.In this talk, we’ll explore how to make meaningful changes to your business logic, APIs, and data structures—without breaking everything in the process. You’ll learn how to design for safety, reversibility, and flexibility, so you can move fast and sleep at night.We’ll walk through techniques like feature flags, versioned APIs, shadow writes, and more—all aimed at helping you roll out changes gradually, detect issues early, and recover quickly if things go sideways. After this talk, you’ll be ready to plan and execute changes with confidence.