Jack Hoppus, son of Blink-182 frontman Mark Hoppus, appeared in a recent video on the making of Call of Duty 4: Modern Warfare , in which he’s credited as a technical designer. The video shows Hoppus providing his input after employees at Infinity Ward, the developer behind the Modern Warfare series, went through a multiplayer play test. Hoppus also spoke about the benefits of working at the studio and how the lessons he has learned will make him a better designer. In the bio of his Instagram account , Hoppus labeled himself as a designer for Modern Warfare 4 developer Infinity Ward. Per his LinkedIn page , the 23-year-old has been working at Infinity Ward for two years, starting off as an associate technical designer before becoming a technical designer a few months ago. In a January episode of Danielle Fishel’s Teen Beat podcast , Mark Hoppus said his son told him as fourth grader that he wanted to be program video games when he grew up.…