If you want to build a backend in Rust, Axum (which uses hyper underneath) is pretty recommended these days, as it's all in the tokio ecosystem. Actix Web is good too, but it has its own ecosystem of libraries. I read the book Zero To Production in Rust [0] which was a great overview on not just Rust but scalable backend architectures as a whole.
Interestingly, Cloudflare wanted to use hyper but found that it was too correct, so they had to build their own [1].
[1] https://blog.cloudflare.com/how-we-built-pingora-the-proxy-t...