Depends on your level and your geographical location but a staff engineer could vest anywhere from 300K-800K per year depending - more if you see some meaningful stock appreciation over time. Staff engineers are like top ~10% of a company's engineers. That number can go up significantly if you're a principal engineer.

200K seems pretty average for a senior engineer role (i.e. a 'terminal' role, not an up-or-out junior role) in the Bay Area on top of a 150-200K base.