Two longtime friends with complimentary skills meet a new mobile SDK for building high-performance apps from a single codebase, what could go wrong? Flutter is quite powerful but with great power comes great responsibility. Using widgets, building a meaningful UI in a new way, finding that library we need and getting used to a different architectural approach are some of the many challenges we face as developers and designers when going into the cross-platform world. In this talk we'll review some of this advantages of using Flutter, how to tackle common challenges when adopting it and how can it spark a better collaboration between designers and developers, including roles & responsibilities.