Ask HN: What Node.js framework should I learn to get a job?

I'm a front ender, I used to be full stack with Rails few years ago but specialized into SPA app's after that.

I would like to get back into full stack but looking at nodejs frameworks there's alot to choose from (eg, http://nodeframework.com/index.html#mvc, http://nodeframework.com/index.html#full-stack).

It was easier with ruby, at the time there was only one framework to learn.

My concern is that I choose something which then turns out to not be applicable for the majority of jobs.

So, HN, what would the best node js framework to learn to get a full stack nodejs job?