How to give an option to user to program? Angular and Nodejs?

We have a requirement in which there is an option to code by the user. He/She can code in the front end and at the back end we will store and run that function coded by the user. It is useful for automation so that user can be peaceful instead of sitting in front of the computer all day for monotonous tasks. We would like to use javascript so that it can be used on our back end.

via Rajasekar Muthusamy