 Pedestrians outside Twitter headquarters in San Francisco on Oct. 6, 2022. David Paul Bloomberg Getty Images Twitters full-time headcount has dwindled to approximately 1,300 active, working employees, including fewer than 550 full-time engineers by title, according to internal records viewed by CNBC. Around 75 of the companys 1,300 employees are on leave including ... Twitter is down to fewer than 550 full-time engineers... 