I do a lot of recruiting, for both paid and volunteer coding roles. I've been hiring for about 13 years, and I've been coding professionally for about 25 years. Before that I coded as a hobby, from about age 11.

Speaking from this experience, and as someone who reviews on average 20-50 coder profiles a week, the public commit history of a coder is almost never a significant factor. I don't see any trends that indicate this is changing, either.

The vast majority just don't have much to show, having spent their years working behind walls on closed software.

Instead of relying on a public portfolio that in most cases won't exist, I rely on talking to these people directly, programmer to programmer. If we can code together, on the actual code they would be working on, that's about as good as it gets.

In other words, I rely on my experience as a coder to help make what are, ultimately, subjective judgement calls.

There are two sides of the coin here, which should not be opposed in my opinion.

I've done a fair bit of recruiting for clients willing to build technical teams (developers / data engineers / data scientists): my experience is similar to yours in that the large majority of the technical candidates I've been interviewing have no visible trace on GitHub (either because they worked on closed source, or because they are out of school without not a lot of personal drive to work on OSS).

But at the same time, as a freelance consultant for the last 10 years, having work online available for everyone to see or use (OSS or other) has driven a lot of valuable leads to me (e.g. on my niche doing Ruby ETL http://www.kiba-etl.org/).

Last note is I agree with the premise of the article that we are shifting away from "week-end contributors". For me OSS is something I work during the day, even as a single-man shop, and something that is (if properly managed) bringing in a sizeable part of my income.

> the large majority of the technical candidates I've been interviewing have no visible trace on GitHub (either because they worked on closed source, or because they are out of school without not a lot of personal drive to work on OSS).

Or because they work extensively on OSS projects that don't use GitHub.

Actually no (not in my case, I mean! YMMV). Something I can tell with certainty is that in my recruitement channels for the last 2 years, people either do OSS on GitHub, or are not doing OSS at all.

That might be true in your recruitment channels, but in general it's a problematic assumption. Many prominent Open Source projects don't use GitHub; in particular, that applies to those large enough and/or old enough to have and maintain their own infrastructure. I've run into that problematic assumption a few times, and it seems worth calling attention to.

To give examples:

- Git https://github.com/git/git,

- Linux https://github.com/torvalds/linux,

- LibreOffice https://github.com/LibreOffice/core,

- Firefox https://github.com/mozilla/gecko-dev