What technology should I focus on for 2024-25

I have been working on Backend development with NodeJs & ExpressJs with databases like Mysql, pg, redis and rabbitmq and some parts of devops like k8s, gcp etc. for the last 3 years. Before that I was working as a C# developer for 2 years. Now I want to learn something challenging. I am done with creating websites and normal stuff.

People are recommending different things like Golang, Rust, Ruby on Rails, Elixir or anything else.

I want to get a global remote job next year. So what should I work on so that I can work accordingly. The competition shouldn't be that much and side projects should be enough to get a good job. Or give a good roadmap.