The chief financial officer of Jawbone, the troubled consumer tech company that made popular Bluetooth speakers and the UP activity tracker, has left the company, The Verge has learned. Former CFO Jason Child had joined Jawbone in July 2015 from Groupon, where he had served as chief financial officer for nearly five years and took the company public. According to Child’s LinkedIn profile, he is now on the global advisory board of the business school at the University of Washington.