I am a Web Developer in Germany who started a new job at an agency three months ago which I really do like working for. Now someone at a major tech company was offering me a position and it's a really attractive offer. The payment and the benefits I would get are great. Under normal circumstances I would just immediately take the offer but my situation is a bit different.
I only started a job three months ago and they really put some effort into teaching me their business rules and used resources for that. They also sent me to a conference which was a nice thing to do. It would be really a bad move from me if I just left the company. Since I'm in probation I could almost immediately do that but I'm in a real struggle.
Should I tell my supervisor that I will be leaving but I am willing to stay until they find someone else but no longer than the end of my probation period (of which I have three months left)? Because finding competent emlpoyees and teaching them the business rules does really mean effort. Or do I care too much and should I better be just leaving?
What options do I have besides that? I don't want to disappoint my current employer and I want to split in good terms because I really like the current company.
But the job offer at that new company is like winning the lottery and in terms of my career it would be pretty stupid not to take the offer.