1) added buzz keywords in his resume
2) hosted an instance of gitlab and took various open source projects (stuff that was not popular, but had enough polish), modified them and uploaded them.
After a week, he was able to land multiple interviews. While he did get called out once, almost all engineers/non-tech hr didn't bother calling his bluff.
I am not suggesting that you should lie on your resume or steal open source projects, just that depending on one factor (like github, or resume, or white boards) is futile and that tech hiring in general is broken.