The OS Performance Tools team is looking for a software developer with a keen understanding of operating systems and frameworks to help us build world class developer tools for performance analysis and optimization. Our tools, which include popular performance analytics frameworks like MetricKit, enabler app developers to build highly performant iOS, visionOS, watchOS, macOS, and tvOS apps. A successful candidate may have experience with a specific layer of software (e.g. embedded, UI, server) but an interest in learning how the entire stack and flow of information works. The ideal candidate would also not only understand the fundamentals of designing and implementing a performant application for iOS, macOS, tvOS, or watchOS, but also the impact of big data on decision making in software development.