What they have running can run forever on it’s own. You need the ops people. phone answerers. have you talked to an uber person other than the driver? outsource ops to truth social.
Not quite. The engineers are: internal tools (including the help center, the Twitter admin, A/B testing framework, etc.), infrastructure (performance, Rails tweaking, writing job daemons), API/platform, relevance (trends, user recommendations and similarities), webclient (rewriting Twitter as a client-side application in JavaScript, other features for the web client), mobile, search, ads, release, and internationalization.
Did you know Twitter has a global network backbone with hundreds, if not thousands of peering relationships? Several hundred GB of internet traffic runs over it per day. Static video, pictures, live video and more.
There are constantly 6–10k tweets per second containing any mix of content, and it increases significantly during world and local events. And that is just contributions to the platform, not consumption of the content. It is not just a little simple website. There is a significant app layer and backend, which requires thousands of servers.
Just to support the infrastructure you have systems engineers, network engineers, hardware engineers, database administrators, data center operations, and many more. That doesn’t even start to include engineering staff to innovate and maintain the application. There are also IOS and Android app developers to maintain those applications that access the platform.