Does Upwork require pre-employment background checks? What kind of background check does Upwork do and how long does it take to complete?
No. Upwork is a platform that links you with employers, the employers on upwork are only concerned with your ability to carry out a task and not where you've been to learn how to.
You aply to jobs by submitting proposals and the employer checks your qualifications for his Job and after much ado, if s/he sees you fit, you're hired