In the summer of 1994, Jaap Haartsen started worked on what would become a ubiquitous and essential technology - Bluetooth. The 31-year-old Dutch engineer was living in Sweden and working for Ericsson.
He never worked weekends, or more than 40 hours a week. He had a cell phone and laptop, but doesn't recall having Internet at home. Every weekend he immersed in nature with his wife and three young children.
