“New hires are given an industry-average base salary, a signing bonus spread over two years, and a grant of restricted stock units over four years. But unlike other technology companies, such as Google and Microsoft, which spread out their stock grants evenly, Amazon backloads the grant toward the end of the four-year period. Employees typically get 5 percent of their shares at the end of their first year, 15 percent their second year, and then 20 percent every six months over the final two years. Ensuing grants vest over two years and are also backloaded, to ensure that employees keep working hard and are never inclined to coast.”