Linux Kernel Engineer

Apple Inc.; Dublin; On-site; EUR 90,000 - 120,000; Full time

Job summary

Apple Inc. in Dublin, Ireland, is seeking a Linux Kernel Engineer to own kernel lifecycle from CI to production-quality releases.

You will design, build, and operate CI and validation pipelines that span multiple hardware platforms and distributions, triage regressions, and drive fixes to resolution. You will port, maintain, and upstream device drivers, collaborating with SRE, platform, and hardware teams to ensure kernel stability, performance, and debuggability for real-world workloads.

Qualifications

• Experience developing or maintaining the Linux kernel or low-level system software.
• Debug kernel-level issues using perf, ftrace, bpftrace, crash, gdb, or similar.
• Deep understanding of kernel tuning for stability and performance across many subsystem domains.
• Hands-on experience developing CI/CD systems integrating operating system components and managing kernel releases.
• Strong programming skills in C, plus proficiency in at least one of Rust, Go, Python, or Bash.
• Solid understanding of operating system fundamentals: processes, memory management, filesystems, networking, scheduling, interrupts, and hardware/driver interactions.
• Experience working in a RHEL based Linux environment, including RPM packaging and the RHEL kernel back port and release process.
• Strong collaboration and communication skills; comfortable working with cross-functional teams (SRE, platform, hardware, security).

Responsibilities

• Design, build and operate CI and validation pipelines that compile, test, and release Linux kernels across multiple hardware platforms and Linux distributions.
• Lead triage of kernel regressions, investigate crashes and performance issues, drive fixes to resolution.
• Collaborate with engineers across Apple to port, maintain, and upstream device drivers, shepherd kernel changes into production.

Skills

Linux kernel

Kernel debugging

Kernel tuning

CI/CD for kernel

C programming

Scripting languages

OS fundamentals

RHEL packaging

Collaboration

Education

Bachelor's degree in Computer Science

Job description

Selection changes the language of the page/content

Dublin, County Dublin, Ireland Software and Services

At Apple, we craft experiences that have transformed entire industries. The diversity of our people and ideas fuels innovation in everything we do. Imagine what you could build here.Join our Linux Kernel Engineering team and play a central role in the reliability, performance, and evolution of Apple’s platforms. As a Linux Kernel Engineer, you will own the kernel lifecycle end to end, from CI infrastructure and automated validation to driver enablement, debugging, and production-quality releases.You will partner closely with platform, infrastructure, and SRE teams to ensure every kernel we ship is stable, observable, and ready for real world workloads at scale.

Description

In this role, you will design, build, and operate CI and validation pipelines that compile, test, and release Linux kernels across multiple hardware platforms and Linux distributions. You will lead triage of kernel regressions, investigate crashes and performance issues, drive fixes to resolution, and qualify new hardware at the kernel layer.You will collaborate with engineers across Apple to port, maintain, and upstream device drivers, shepherd kernel changes into production, and continuously raise the bar on kernel quality, automation, and release discipline. Your work will have direct impact on the stability, performance, and debuggability of systems that power critical Apple services.If you enjoy deep kernel debugging, building robust CI systems, and owning kernel releases from development through production, we would like to hear from you.

Minimum Qualifications

• Experience developing or maintaining the Linux kernel or low-level system software (e.g., kernel modules, device drivers, or core OS components).
• Proven ability to debug kernel level issues (panics, hangs, performance regressions) using tools such as perf, ftrace, bpftrace, crash, gdb, or similar.
• Deep understanding of kernel tuning for stability and performance across many subsystem domains.
• Hands-on experience developing CI/CD systems integrating operating system components and managing kernel releases.
• Strong programming skills in C, plus proficiency in at least one of Rust, Go, Python, or Bash.
• Solid understanding of operating system fundamentals: processes, memory management, filesystems, networking, scheduling, interrupts, and hardware/driver interactions.
• Experience working in a RHEL based Linux environment, including RPM packaging and the RHEL kernel back port and release process.
• Strong collaboration and communication skills; comfortable working with cross-functional teams (SRE, platform, hardware, security).

Preferred Qualifications

• Proven track record of upstream contributions to the Linux kernel project or similar upstreams.
• Bachelor of Computer Science or equivalent skills and work experience.

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