Apple is seeking a Principal Machine Learning Engineer to join their ML innovation team, focusing on developing cutting-edge ML technologies that impact billions of users. This technical leadership role involves working with both junior and senior engineers to design and implement ML solutions for personalization, memory, diagnostics, and reasoning systems. The position requires deep expertise in ML fundamentals, including mathematics, architectures, and generation processes. With a competitive base salary range of $197,400-$360,200, plus additional benefits including stock options and comprehensive healthcare, this role offers an opportunity to shape the future of ML applications at Apple. The ideal candidate will have 7+ years of ML experience, strong leadership abilities, and a PhD or equivalent experience. You'll work in Seattle, collaborating with cross-functional teams to drive innovation in ML applications for Apple's products and services. This role combines technical expertise with leadership responsibilities, making it perfect for those who want to impact technology at a global scale while working for one of the world's most innovative companies.