Comment Extend your notice period? (Score 1) 735
It's still possible to be loyal and yet move on. It may be that the new company would accept you working a longer notice period at your current employer (for example, if you're on 4 weeks ask if they'd wait 6 or even 8 for you)? That should be sufficient to ensure that the company can bring someone else in of a similar skill level to yourself, that the product can be handed over with minimal disruption, and you leave things in a stable situation.
It's your career, after all. Sometimes you do have to be selfish, otherwise you will never leave.