I see some comments talking about Twitter employee population is too big, is there any statistics about what the percentage is for each department?<p>Despite the fact I agree the population is quite large, but I can guess at least 30% are marketing folks, 20% are HR and process people, and then the rest are developers. Twitter has done a number of acquisitions. I don&#x27;t know how many people are running Vine in production today, but my understanding is their NY core team is still quite small. However, given Twitter has launched so many products (including all of the background projects they did to support their production), I won&#x27;t be surprise if they have at least 10% of their entire engineering force doing infrastructure and operation, and then 40% divided into core product like Twitter, internal application developers, security, solution engineers, etc.<p>When a new CEO is in charge, some layoff and some re-org usually happen. Some projects have to be closed, some have to be sunset, and some have to be merged. Let see how much they can trim down. It usually take a year to complete the evaluations and projecting new positions.