Apple Services Engineering Security team is seeking a Senior Security Application Engineer to help build and maintain secure systems for Apple's global services including iCloud, Music, Siri, and the App Store. This role focuses on developing security controls, guardrails, and frameworks to protect customer data in Apple's infrastructure. As a senior engineer, you'll work with cross-functional teams to design and implement critical security platforms and tools, participating in the entire software development lifecycle from requirements gathering to deployment. The position offers competitive compensation, including base pay ranging from $175,800 to $312,200, plus equity opportunities and comprehensive benefits. The ideal candidate brings 10+ years of software/security engineering experience, strong technical expertise in languages like Java/Python/Go/Swift, and excellent collaborative skills. This is an opportunity to impact security at one of the world's most influential technology companies, working on services that affect millions of users globally. The role combines technical leadership, hands-on development, and security expertise while working with teams across Apple's ecosystem.