Imho all these tools like nvm, rvm etc are deeply flawed and doesn't really do their jobs all that well.

Where I work we use the nix package manager. Making sure your team is using the same version of node is just a few lines of config away:

  with (import <nixpkgs> {});
  
  mkShell {
    buildInputs [ nodejs-8_x ];
  }

Pinning the whole package tree is just a few more lines away and offers you full reproducibility but I omitted it for brevity.

Another upside is that this approach is language agnostic and works for all tools packaged in the nix package repository.