Honestly I don't see how anyone can answer this without knowing what you are already making and what your local market is offering (assuming you also want to stay in the same place with the same title). If you're underpaid (e.g. making $65k in the Bay) you could more than double your salary quite easily. However if you're already making $200k as a senior engineer in say Seattle or Austin, well I would expect anywhere from 0 to a decrease, with a very rare possibility of an increase at all.