Design systems are a crucial part of the app development process, enabling teams to create well-structured, consistent, and maintainable applications. In this talk, we will define what a design system is and explore what it can do for you. We'll discuss common pitfalls and what to look out for while creating your own, before diving into a practical example of how to implement a consistent design system within a reusable component library for your Flutter application. Finally, we'll cover tooling and best practices to keep everything in sync and consistent.