I’m doing Nix consulting-type jobs - it can mean anything from simply packaging some stuff for Nix and making a devShell to refactoring existing Nix-based infra (which can be hundreds of thousands of SLOC) to building entirely new developer UX, CI/CD and even production deployments on Nix/NixOS. I’ve also been paid to implement some cool features into Nix itself, fix bugs, etc. I’m really quite happy with the job, even though it could probably pay more :)

Eh, probably if Guix becomes significantly better I’ll switch to it (from NixOS). I really like how seriously they take user freedom, bootstrapping (only 357 bytes of binary to bootstrap everything else from source!) and consistent user interfaces (scheme everywhere). But unfortunately the package repo is just not big and mature enough yet, and declarative configuration options are not as good as they are with NixOS. My job is also Nix-related, and that’s another major reason I’m staying for now.