Once, a long time ago, I was a product manager. Then, I was an engineer. For the past seven years, I’ve been in design. Every single day, I work with people in all of these roles. Every single day, I find new ways to appreciate the responsibilities, challenges, and art behind each of these three pillars of product development. For all the engineers and PMs out there wondering how to crack the strange, retina-sharp, helvetica-typed world of design: this is for you.