If I could choose anything, I'd go with Rust, Clojure, or F#. I'm currently working with C#/.NET and enjoy C# well enough, but mostly hate .NET.
I had a fantastic experience writing a thoroughly-typed, functional-style REST API using TypeScript -> Node recently, and I'd highly recommend that for someone who is practically-minded.
I had a fantastic experience writing a thoroughly-typed, functional-style REST API using TypeScript -> Node recently, and I'd highly recommend that for someone who is practically-minded.