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Apple

# Darwin Runtime Engineer, Core OS

Cupertino, United States of America Operations 

Listed on Apple’s official careers site. Posted October 26, 2026. Check that it is still open and apply there.
[Apply on Apple’s careers site →](https://jobs.apple.com/en-us/details/200691491/darwin-runtime-engineer-core-os)

[OpenNash Jobs](https://jobs.opennash.com/) / [Apple](https://jobs.opennash.com/companies/apple/) / Darwin Runtime Engineer, Core OS

## Job description

For the engineer who obsesses over the butterfly effect of a single line of code, there is no greater stage than Apple's Core OS! Core OS builds uncompromising, lightning-fast foundation that iOS, macOS, watchOS, tvOS, and visionOS stand upon. We don't just write software; we forge the soul of the machine, ensuring the operating system and the hardware breathe as one to create a seamless device identity. At the center of it all is Darwin, the UNIX-like heartbeat of Apple's operating systems, spanning from the deepest levels of the kernel up through critical low-level user components.

The Darwin Runtime team is seeking visionary engineers to push the boundaries of low-level system technologies. If you obsess over performance, security, and the massive cascading impact of your code, your life's best work is waiting for you here!

## At a glance
- Posted by the employer: Oct 26, 2026
- First seen by OpenNash: Nov 1, 2026
- Last checked: Nov 1, 2026
- Listed for: 6 days
- Location: Cupertino, United States of America[Apply on Apple’s careers site →](https://jobs.apple.com/en-us/details/200691491/darwin-runtime-engineer-core-os)

## Hiring at Apple
- Open jobs: 6,319
- New in the last 7 days: After two weekly collections
- Tracked since: Jul 10, 2026

[All Apple jobs](https://jobs.opennash.com/companies/apple/) · [Weekly hiring report](/reports/hiring/)

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Dates come from the employer where stated; “first seen” and “last checked” are our own observations.

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