Darwin Runtime Engineer, Core OS

Apple • Cupertino, CA

3h

About The Position

The Darwin Runtime team in Core OS is looking for enthusiastic engineers interested in developing low-level system technologies for Apple’s 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, you'll work closely with kernel engineers, security architects, and framework developers to deliver foundational technologies that enable Apple's next-generation computing platforms.The 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!

Requirements

• Passion for low-level system technologies
• Fluency in the C programming language
• Experience with UNIX-like systems
• System design and architecture skills
• Strong understanding of operating system fundamentals like threading, synchronization primitives, inter-process communication, scheduling, and virtual memory
• Excellent collaborative skills, with the ability to work with a team to design system architecture

Nice To Haves

• Experience with compiler design, including lexical analysis, parsing, semantic analysis, and code generation
• Knowledge of capability-based security models, sandboxing, and secure IPC mechanisms
• Knowledge of operating system implementation, hardware architecture and assembly programming
• Knowledge of Swift or Objective-C
• Skilled at interface and/or API design
• Experience with lldb or gdb

Responsibilities

• Building low-level runtime technologies like Grand Central Dispatch (GCD), secure inter-process communication systems, memory allocator, threading library, and concurrency and synchronization primitives.
• Operating at the intersection of operating systems, programming language design, systems security, and high-performance computing.
• Working closely with kernel engineers, security architects, and framework developers to deliver foundational technologies that enable Apple's next-generation computing platforms.
• Participating in design discussions, code reviews, and development across multiple technologies.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed