Job Description Amazon 's Product Advertising program handles the placement of hundreds of millions of ad impressions every day on Amazon .com and other websites (See http://www.amazonservices.com/ productAds/index.html ). The optimization team plays a critical role in improving ad targeting and optimizing the revenue we realize from displaying ads. We apply data mining and machine learning on terabytes of data to build intelligent systems addressing key problems in the online advertising space: when we show an ad, how likely is it to get clicked? What are the ads which are most relevant given the page content? Does a website have objectionable content? We have a tight cycle of data mining, prototyping, and testing in production which allows us to make iterative improvements quickly. Our business is rapidly expanding into new areas and bringing in new, challenging problems. We're seeking a skilled and innovative software engineer with aptitude in applied mathem...