Ask HN: Any open-source to contribute and get hired?

Not a direct answer. But with https://developers.google.com/open-source/gsoc/timeline a whole bunch of organizations are publishing projects. https://summerofcode.withgoogle.com/archive/2024/organizatio... It's aimed at students, there is payment, it's not full-time, but might be a better projects than random github issues.

I think you're going to scarcely find a company that has a direct open source -> hire pipeline. However, one of the most valuable parts of contributing to open source that I have personally found is forming connections and having those connections referring you to companies. I encourage you to find a company + project combination that you enjoy, find ways to collaborate, and make relationships. Doing that will likely yield huge dividends.