Darwin Runtime Engineer, Core OS

The people here at Apple dont just build products we build the kind of wonder that revolutionise entire industries. Imagine what you could do here! Do you have a passion for understanding how each line of code affects all the others In the Core Operating Systems group ensuring the OS is inseparable from each devices identity as a whole. Thats because this group is committed to building fully integrated operating systems that combine hardware software and apps into a single Apple experience. Your dedication to cross-disciplinary collaboration will help develop groundbreaking technologies such as iOS macOS watchOS and tvOS. By crafting these distinct complete user experiences youll continue to uphold and advance the excellence people expect from Apple devices! The Darwin Runtime team in Core OS is looking for enthusiastic engineers interested in developing low-level system technologies for Apples operating systems.

The Darwin Runtime team is responsible for building the low-level runtime technologies like Grand Central Dispatch (GCD) secure inter-process communication systems memory allocator threading library and concurrency and synchronization primitives. The team operates at the intersection of operating systems programming language design systems security and high-performance computing. As a Software Engineer on the team youll work closely with kernel engineers security architects and framework developers to deliver foundational technologies that enable Apples next-generation computing ideal candidate should be self-motivated and effective in operating independently with a desire to learn and develop technical leadership. Team members are welcome and encouraged to participate in design discussions code reviews and development across multiple technologies. Our environment fosters technical innovation meaningful technology ownership and a liberating amount of autonomy! n

You will be responsible for working on a range of technologies that form the foundation of Apples operating systems. The work would include responsibilities such as:nDesign and implement new features and APIs for Darwin Runtime technologies like GCD XPC pthread and mallocnDesign and implement IDL compiler frontend and backend systems including lexical analysis parsing semantic analysis and code generation for both C and Swift targetsnDevelop and maintain high-performance runtime libraries that handle secure communication memory management and component lifecycle across different execution environmentsnOptimize code generation runtime performance and memory usage to meet strict performance requirements for low-level systemsnAn engineer in the Secure Runtime team would regularly:nParticipate in all phases of software development cycle: from problem definition and design through implementation testing and debuggingnDiagnose and resolve issues across different layers of the stacknWork with cross functional teams to enable developer and product requirements

BS or MS in Computer Science or equivalent degreen0-3 years of relevant industry experience in low level systems programmingnPassion for low-level system technologiesnFluency in the C programming languagenExperience with UNIX-like systemsnSystem design and architecture skillsnStrong understanding of operating system fundamentals like threading synchronization primitives inter-process communication scheduling and virtual memorynExcellent collaborative skills with the ability to work with a team to design system architecture

Experience with compiler design including lexical analysis parsing semantic analysis and code generationnKnowledge of capability-based security models sandboxing and secure IPC mechanismsnKnowledge of operating system implementation hardware architecture and assembly programmingnKnowledge of Swift or Objective-CnSkilled at interface and/or API designnExperience with lldb or gdb