Stewart Butterfield : The $5bn tech boss who grew up without electricity

Stewart Butterfield Stewart Butterfield is worth an estimated $650m Stewart Butterfield The BBC’s weekly The Boss series profiles a different business leader from around the world. This week we spoke to Stewart Butterfield, the founder of technology companies Flickr and Slack. It is not the sort of upbringing you’d associate with one of Silicon Valley’s heavyweights. But Stewart Butterfield spent …