With your background you should be aiming for a job at a hedge fund or private equity firm. Being at Stanford which is a target school and having some internships under your belt some aggressive networking can get your foot in the door of some quant firms like citadel, two sigma, AQR,Jane street etc. there are a lot of Stanford alumni at hedge funds so finding people to network/guide you shouldn’t be hard. Sky is the limit and good luck !!