I do both, and I’m not actually super awesome at either. It turns out to be less important than many think. My design work is professional, but isn’t going to win any awards. My dev skills are pretty good within the context of WordPress - there isn’t much I haven’t done on that platform. But I’m pretty sure I’d be laughed out of the room at a Google or FB. I was a senior engineer at a BigCo but my role there was more leadership and PM than coding.