This story is available exclusively to Insider subscribers. Become an Insider and start reading now. Cal Henderson is the cofounder and chief technology officer of Slack, acquired by Salesforce in a $27.7 billion deal closing later this year and boasting more than 2,500 employees and 142,000 paid customers. He talked with Insider about his early career ambitions — making video games — his thoughts on remote work and workplace norms, and the company's goals and initiatives for the new year. Henderson's advice to other leaders and companies during this time is to be "organizationally agile." "It's about how quickly you can actually change direction, and that kind of alignment is hard to do without strong relationships," he said.