Facebook-owner Meta Platforms has cut plans to hire engineers by at least 30% this year, CEO Mark Zuckerberg told employees on Thursday, as he warned them to brace for a deep economic downturn.

"If I had to bet, I'd say that this might be one of the worst downturns that we've seen in recent history," Zuckerberg told workers in a weekly employee Q&A session, audio of which was heard by Reuters.

Meta has reduced its target for hiring engineers in 2022 to around 6,000 to 7,000, down from an initial plan to hire about 10,000 new engineers, Zuckerberg said.