Your team has just hired a React Developer to work on your Typescript codebase. Both your team and the new engineer are eager to start building features, but they only have experience writing Javascript. How can you quickly onboard the engineer to Typescript while still providing them with time and space needed to learn the language effectively? In this talk, we’ll discuss why Typescript fundamentals, like function types, interfaces, and generics, can be intimidating for learners. Then, we’ll walk through successful, practical approaches for teaching each of these concepts and relating them back to React. By the end of this talk, you’ll have the building blocks for creating a fruitful onboarding session for your engineers.