Your overarching goal is to ensure you hire competent people of character, and that every hire—at least for product managers, product designers, and tech leads—should raise the average. Note that since we have more than one engineer on a product team, it is not a problem to have a range of experience and capability levels in our engineers. However, for product managers, product designers, and tech leads—since there is just one each per team—it's critical to ensure a high standard of competence. Those are not “junior” roles.
