Walmart’s growth team enlisted the engineers to build an app that could allow customers to upload their receipts from shopping at Walmart via their phone’s camera and automatically receive cash refunds from the company if another chain had advertised any of their purchases for less. In addition, the engineering team realized that it could marry the data Walmart was collecting as part of its price matching program with the ad campaigns being run by their paid search teams, leading to big savings in ad spend by only bidding aggressively on items where they were the clear price leader.
