is a computer programmer a job

Answer 1

Yep its is.
You can work as a freelancer too, all you need is skills.
I have read an article about guy who studied high school only and he was a programmer and google recruited him just because he had amazing skills.

Answer 2

what is a freelancer

Answer 3

self-employed and hired to work for different companies on particular assignments.
Freelancing websites- freelancer.com, elance.com, odesk.com and many more