Eh, Buddhism doesn’t really have much in the way of belief in an afterlife as such. Some branches might, as it’s a fairly syncrestic religion and is easy to graft on to whatever beliefs you already have. But by and large the afterlife is not a significant component of Buddhist philosophy except, perhaps, as a brief layover before one’s next incarnation (refered to as the Bardo, or “intermediate state”, in Tibetan Buddhism).
At any rate Steve Jobs may have claimed Buddhism, but from everything I’ve read by, from and of the man I see little to suggest that he took the Buddhist teachings to heart.