Elon Musk has gotten into a Twitter spat with the co-founder of Australian software giant Atlassian, Scott Farquhar, over the value of putting an end to remote working.

In an internal email this week, the Tesla chief executive said “everyone at Tesla is required to spend a minimum of 40 hours in the office per week”.

“If you don’t show up, we will assume you have resigned,” the email said.

That drew criticism from worker advocates about potential exposure to the coronavirus.

Mr Farquhar on Thursday ridiculed the directive in a series of tweets as being “like something out of the 1950s”.

Atlassian’s “work from anywhere” policy was “key for our continued growth”, he said.

“We’re setting our sights on growing Atlassian to 25K employees by FY26,” Farquhar concluded. “Any Tesla employees interested?”

Musk shot back: “The above set of tweets illustrate why recessions serve a vital economic cleansing function”.

The exchange is not unusual for Musk, who frequently uses Twitter to make unapologetic pronouncements about sensitive subjects.

In Silicon Valley, many tech firms moved to mixed home and office working during the pandemic, while others have set dates for returning to the office only to push them back as new outbreaks have occurred.

Musk, the world’s wealthiest man and also chief executive of SpaceX, also has a record of taking on other billionaires.

In 2021, he posted an image of a second-place medal in response to a tweet by Jeff Bezos celebrating the success of Amazon.

In 2017, Farquhar’s Atlassian co-founder, Mike Cannon-Brookes, co-operated with Musk, publicly taking up and facilitating his offer to supply a powerful Tesla battery installation for South Australia after it suffered a blackout.

Cannon-Brookes, who has since led a campaign to buy Australian energy company AGL and speed up its transition to renewable power, reposted Farquhar’s remarks criticising Musk’s return-to-office order.