We are seeking a world-class researcher to address challenging problems in personalization science using the latest advances in machine learning. This role involves developing novel solutions to enhance personalized experiences across the App Store, impacting a global audience. The responsibilities include developing and applying cutting-edge machine learning and artificial intelligence techniques for personalization, conducting human evaluations and rigorous experiments, deriving insights from experimentation, deploying production-quality code, contributing to scientific literature, and shaping the future of personalization across Apple's ecosystem. The role offers the opportunity to see your solutions deployed at Apple's global scale, contributing to personalized user experiences across the App Store.