I'm currently halfway though my interviews for tenure-track computer science faculty positions in the US. I've been offered a really great postdoc opportunity. I want to take up the postdoc and defer the start date of my faculty position by a year.
The trouble is that the postdoc wants a definite answer from me soon and they have said that I should get approval from the places where I have interviews. I feel like it is premature to discuss deferring an offer before I even have one. Potentially it will look bad.
How do I delicately raise this issue with the places I am interviewing at? Or should I simply accept the postdoc and deal with the deferral problem later if and when it arises? I assume this situation is pretty common and someone can tell me how this is usually dealt with.