Hardware Engineers design the components that power computers, such as sound and graphics cards, circuit boards, processors and memory storage devices. They also typically design the computer hardware used in other devices, such as medical equipment, vehicles and smartphones. By performing the duties outlined in a Computer Hardware Engineer job description, they play an important role in developing new products and technologies. The testing and quality assurance responsibilities of Hardware Engineers reduce the risk of end-users experiencing technical issues. As a result, their work directly contributes to customer satisfaction rates while lowering liability risks for their employers.