I have been helping another department (30% of my time) in my company as somebody left the role. Of course, I am doing this after my boss' approval. Now that department wants me to interview for the full-time position.
I think there is a decent chance (60-70%) of getting selected. They are also interviewing other candidates which have more experience than me. Chances are even if I get selected, I will have to work with my current boss in my new role because of cross-functional dependencies within company.
I am not too happy with my current job and my boss already is aware of my view on the current job. We are working to get this situation resolve.
My worry is that if I tell my boss right now and if I don't get selected for the new position within company, it may backfire more than if he know about it later on.
Should I tell or not?