Google SREs are split into SWE-SRE and System-SRE. They have different interview processes and job ladders. Usually they have the same job functions day to day,

Google SREs are split into SWE-SRE and System-SRE. They have different interview processes and job ladders. Usually they have the same job functions day to day, but anecdotally it seemed like SWE-SREs were SWEs who got into SRE and System-SREs had more traditional sysadmin background. Disclosure: was a Google SRE