Robotics at Apple, Google

I am interested in working at Apple or Google or Tesla specifically in robotics for manufacturing. My background is in robotics for the automotive industry as well as research robotics through Georgia Tech. I have applied to Apple and Google and Tesla for years for robotics engineering positions and gotten nowhere (I even used alumni connections to submit referrals). Does anyone have any advice as to what I may be missing in my background, or skills, or anything to be successful in getting into Apple or Google or Tesla? #apple #roboticvisiontech #roboticvisiontech #google #career #tesla