Github is a FOSS environment. So if a coder have not participated in open source projects, there is no reason for him/her to have a github account. Also, in relation:
- If a coder does not know git, that is a serious problem.
- If a coder is using github for private projects, that is a more serious problem. Only exception might be s/he was forced by the organisation s/he was working for…
Also in relation as well:
- Some people are pushing that a programmer should participate in FOSS in order to develop his/her career. No they are not, FOSS is not a playground for people to develop their skills.
Addendum: I have realised that some people are missing a point in my above reply. I do not mean a “project” as a program which consists of 4–5000 lines and three source files. A program that a recruiter can evaluate for hiring a programmer can be a 4–5000 lines code. An actual project for me is something like a minimum of 20–40 files and minimum of 50.000–60.000 lines. If a recruiter is claiming to read and evaluate such a code for hiring a candidate, stay away from there in any case.