Join me for an insightful exploration into the world of Canva’s Apps Software Development Kit, where the focus is on empowering developers to build creative apps and reach our massive user base of 165 million. In this talk, I will unveil the process and philosophy behind creating an App SDK that serves Canva engineers, system integrators, partners and external developers needs. Drawing from my team’s experience, I'll discuss how we've tackled the challenges of scaling app development, ensuring maintainability, and simplifying the process for all developers. This talk is about understanding the synergy between internal tooling and external SDK development, and how it can lead to more efficient, creative, and user-friendly app development.