FWIW I developed TurboHDR (https://www.turbohdr.com/ https://www.turbohdr.com/) in Go on App Engine. I've found App Engine a very productive dev environment as

FWIW I developed TurboHDR (https://www.turbohdr.com/ https://www.turbohdr.com/) in Go on App Engine. I've found App Engine a very productive dev environment as it provides a lot of features out of the box (e.g., image processing, background tasks, email etc.) that can be a pain to integrate into frameworks like Django. And developing on App Engine in Go is especially nice as the performance is excellent, and since Go is a statically typed language, I can be more confident about doing sweeping refactoring of my code knowing that the compiler will catch any trivial type errors.