I am building modelbox right now - https://github.com/tensorland/modelbox I began building this in Rust while also learning the language. It became quickly very complex as I started introducing streams in async traits. I think in a few years things will get a lot better as more people use Rust for building web services, but I had to go back to Go to be more productive and ship this thing out. I loved how the compiler was forcing me to think harder about life times and such.