"Designer" is underspecified. Engineers are, in general, bad at two things: - Designing a product that people want to use. By this I mean focusing the idea, c

"Designer" is underspecified. Engineers are, in general, bad at two things: - Designing a product that people want to use. By this I mean focusing the idea, cutting off the extra bits, refining the workflow, making it simple enough for people to understand, pivoting it slightly to solve a different need, and designing the basic methods of interaction. - Making it look pretty. "Designer" could mean either (or both! or neither!) of these tasks. The first is what a co-founder should be. The second is someone you hire.