On Jan. 11, Sophie Alpert, a Facebook engineering manager who ran a major open-source project called React, made an announcement on Twitter: "today's my last day at Facebook."
In the tweet, which got 3,600 likes and elicited 247 comments, Alpert said she was leaving to join a start-up called Humu. But she neglected to tell her more than 41,000 followers the reason for her abrupt departure.
Four days earlier, Alpert, who identifies as transgender, provided that reason in an internal post viewed by CNBC. Alpert wrote on Workplace, Facebook's internal social network, that she'd been harassed by her colleagues after criticizing the lack of diversity at the company. Among other things, she said she'd been attacked on Blind, an anonymous workplace app.
"Facebook is good for many people, but it's not the right place for me right now," Alpert wrote. "I want to spend my time at a place willing to push further on diversity and inclusion. One where it's not OK to write on Workplace that white privilege doesn't exist. One where if I call out that our board has too many white men, I don't get harassed by other employees on Blind with transphobic messages saying I should be fired."