Analytics, logging, "Artificial Intelligence", the latest Fad in devops/application development, System administration duties, help desk duties, hiring/interviewing duties (you don't get to 1500+ without A LOT of this!), the refactoring after the clusterf* of using the latest Fad in devops/application development.

"BIG" data pipelines, managing an Elasticsearch cluster, PM for the design of app 1, PM for the design of App 2, (for probably dozens of apps), QA teams, Design teams, Localization teams, Accessibility teams, SEO and marketing automation teams, teams to build out their CRM, and the all important management layer to interface all these teams together!

This, this ladies and gentlemen, is how Silicon Valley changes the world.