Java developers are cheap and easy to find. There are libraries for everything that you would need - AWS SDK, Redis, etc. Performance is tolerable and can be improved with things like Micronaut and native ahead of time compilation (GraalVM).
I wish.
As opposed to what developers that aren't cheap? Node.js? PHP? C#? Python? I have no idea what developer you're talking about here. Do you think JEE developers are cheap?