Before Newegg, Chang owned ABS Computers, a mail order company selling high end PCs and Gaming systems based in Whittier, California. Building on this experience, he founded Newegg in 2001. It has grown into a multibillion-dollar company, becoming the second largest online-only retailer in the United States.
In August 2008, it was announced that Chang would step down as the CEO and chairman of Newegg while still being a member of Board of Directors and Executive Committee. He also retained his position as the President of Newegg's China operations. He was succeeded by Tally Liu. In 2010, upon the departure of Liu, Chang took up his old role as CEO of the company.