I'm in my first job out of college. It's been a few years and I'm now looking for a new role and am interviewing with various companies. My resume says 'references on request', and I have some colleagues and former colleagues that have agreed to be references for the rare times that I've been asked for references.
One of the jobs I'm applying for now is asking for references from 1 peer (done), and 2 superiors. All of the people who have ever managed me still work for the company, and my company does not know that I'm looking for other positions. I would rather keep the fact that I'm actively looking for new roles quiet until I actually get an offer.
What is a good way to handle being asked for references from superiors, when I have no such references to give? (There are four senior engineers on my team, including myself; the only superior on my team is my manager.)