I'm actually kind of new in my company (been here for 4 months now) and my boss has been really kind to me in the way of giving me responsabilities and thrusting my judgement.
I'm a programmer analyst but at this job my title is software developer. I'm pretty sure we should be at least too programmer for the whole factory because there's a lot of project and even more major projects.
Right now I'm starting a major project to connect and add traceability to most of the production plant. It's been something that was asked a lot and they are really behind in their schedule for that.
I wasn't looking for a new job, but I just had an opportunity and it's going really well. There's only one interview left to know if they are going to take me, but everyone at the new opportunity said that it's pretty clear that I'll be a part of the team.
I know usually when there's nothing signed and official you shouldn't even mentionned to your boss that there's maybe an opportunity elsewhere.
The thing right now is that there's really but a few people on the market, so my current job will have a really hard time to hire someone soon. They have major projects and I really think that when I leave (if I have the job) that the whole company will be behind their schedule a lot in means of their project.
The question
My boss has been really kind to me and I'd hate to see all this project go down because I'm leaving. I really thought there should be more than one programmer/software dev in this factory. I thought I could say that I'm not looking for another job, but a one in a lifetime opportunity came to me. That way they could start looking for someone else right now and I could bring up just before saying that there's a new opportunity that we should be at least two doing this job?
My feeling after writting all of this is that I shouldn't mention it to my boss. Am I right?