Travis Kalanick's food empire has a new head for its restaurant tech business.Theo Wargo/WireImageGuido Gabrielli is leaving restaurant tech company Otter after five years, per a company email viewed by BI.Otter's new head is Ashvin Kumar, who most recently worked at fintech Affirm.Otter is a nearly $70 million a year business, Travis Kalanick wrote in an email to staff.One of Travis Kalanick's key businesses just named a new leader, according to a company email reviewed by Business Insider.Guido Gabrielli is leaving Otter, the restaurant tech arm of City Storage Systems, per the company email sent by Kalanick.He is replaced by entrepreneur Ashvin Kumar, who comes from Affirm.Gabrielli is "moving on to a new chapter in his career of substance," Kalanick wrote about Otter's head, who joined the company from Uber.