Hire for professionalism. You've been working on this for a long time. It means it's intrinsically interesting for you, and you've gained quite a lot of interna

Hire for professionalism. You've been working on this for a long time. It means it's intrinsically interesting for you, and you've gained quite a lot of internalized intuitive understanding of the field. It's very unlikely that you find someone who is intrinsically interested of the same things as you. Or has as deep intuitive understanding of all the business variables. But it does not mean he can't provide great value. Id's say it's a red flag if you hire for "passion" instead of "professionalism". True professionals want to do a good job and ship on time. You don't need "passion" for that.