Not me but - I had a friend, and he was a humble guy so I know he was not bragging, had added / fixed somethings in an open source library. I think it was C++.

Not me but - I had a friend, and he was a humble guy so I know he was not bragging, had added / fixed somethings in an open source library. I think it was C++. He was contacted for an interview at Google. The Google person said it was because they saw what he had added. He declined. Which did not surprise me, as I am sure he would not move his family. But this was a number of years ago. IMHO - if you need to justify your skills, as in you are new, or have been out of work, then contributing to an open source would increase your credibility.