A great portfolio is a huge plus (and I've hired people purely based on their open source contributions, usually remote), but as mentioned elsewhere your previo

A great portfolio is a huge plus (and I've hired people purely based on their open source contributions, usually remote), but as mentioned elsewhere your previous code tells me very little about what you're like to work with day-to-day. We usually do something like "here's our mobile app, let's start the process of building it in React - walk me through the process as you go". We all know devs who write beautiful code but are impossible to work with ;-)