Darwin Core OS Engineer — Low-Level Systems & Performance

Relha LLC; Cupertino, Northern (CA, KY); Hybrid; USD 180,000 - 240,000; Full time

Job summary

Apple's Darwin Runtime team seeks visionary engineers to push the boundaries of low-level system technologies. If you obsess over performance, security, and the cascading impact of your code, your life's best work awaits.

You will drive design discussions, mentor peers through code reviews, and own critical components—from GCD to IPC and malloc—ensuring the OS and hardware breathe as one across iOS, macOS, watchOS, tvOS, and Vision Pro.

Qualifications

• Fluency in the C programming language.
• Experience with UNIX-like systems.
• System design and architecture skills.
• Strong understanding of operating system fundamentals such as threading, synchronization primitives, IPC, scheduling, and virtual memory.
• Excellent collaborative skills, with the ability to work with a team to design system architecture.

Responsibilities

• Drive critical design discussions and elevate peers through code reviews.
• Push the boundaries across a spectrum of low-level system technologies.
• Operate autonomously and take ownership of key components from design to delivery.

Skills

C programming

UNIX-like systems

System design

OS fundamentals

Collaboration

Education

BS/MS in Computer Science

Job description

Apple's Darwin Runtime team seeks visionary engineers to push the boundaries of low-level system technologies. If you obsess over performance, security, and the cascading impact of your code, your life's best work awaits.

You will drive design discussions, mentor peers through code reviews, and own critical components—from GCD to IPC and malloc—ensuring the OS and hardware breathe as one across iOS, macOS, watchOS, tvOS, and Vision Pro.