Great question. I'm okay with someone who doesn't have public code, although they will have to work a little harder to verify their skills match their story.

You have some public repos. That's plenty. Even some gists will work

I tell people all the time, if you want to make it easier to get hired, put some work online. This is especially helpful for those without great credentials or history. Take advantage of this, as it's not possible in many other professions.