On Friday, I caught wind that the engineering director in charge of Yahoo's mobile app development, Sandeep Gupta, had resigned. Now I know where he landed: Next Jump . Gupta formerly worked at Apple on the iPod, and put out a slew of iPhone and Blackberry apps for Yahoo, including the Flickr iPhone app, Yahoo Messenger, and the Yahoo Entertainment iPad app. His hire by Next Jump signals that the New York City e-commerce company is planning a big push into mobile apps. Next Jump currently operates employee discount and corporate perks programs for more than 90,000 companies and organizations. It also runs one of MasterCard's rewards programs . Ram Shriram is an investor and board member.