Job adverts are asking for a Github or Stack Overflow account nowadays, I don’t use those sites much so here’s a list of comparable resources:
Here is my list of Debian packages with their QA status. I’ve been a Debian Developer since November 2000.
Here is my Salsa profile, Salsa is the Debian equivalent to Github (using Gitlab software). My account shows as active since 2017 because Salsa was created in 2017.