self-starter 

A millennial who is willing to take less-than-appropriate pay for their work, due to start-ups, terrible market conditions, stingy bosses, or any of the above.

We're looking for a hard working self-starter who can keep up with the fast pace of the office.
Pay? Oh, there won't be any pay.

self-starter by Drnoise March 14, 2017

self-starter 

a person who is sufficiently motivated or ambitious to start a new career or business or to pursue further education without the help of others.

Rob has never got the background of a marketing, but what awesome job he did. He definitely is a self-starter

self-starter by Rayman13 June 24, 2015