[oh_sigh]

I never quite understood that advice. I've worked for multiple FAANGs and have no OSS or really any online presence tied to my name. Just practicing interview-like problems in an interview-like setting is a far more efficient use of time than doing random OSS work if the end goal is to get hired. Those companies really don't even look at your commits to their own codebase when they are considering promoting you - they aren't going to delve through your open source projects to hire you.

Just do things like implement a heap or boyer-moore in pseudocode or python on pen and paper without referring to google.