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Staff Software Engineer - Compilers (LLVM)

Job ID 2025-15696 Date posted Oct. 03, 2025 Location Cambridge, United Kingdom Category Software Engineering Apply

Job Overview:

Are you interested in working on pioneering compiler technology as part of our team of dedicated engineers working with the wider LLVM community? We have an opening for an exciting and varied role in our LLVM team in Cambridge or Manchester, UK.

In this role, you will collaborate with the LLVM community, contributing to the open-source LLVM compiler and other LLVM projects, to make the best use of Arm architectural features such as SVE and SME. You will analyse and improve the performance of applications and benchmarks running on Arm hardware.

Responsibilities:

  • Provide technical leadership on LLVM compiler development for Arm, owning key areas of performance optimisation and steering work from design through delivery.
  • Shape direction for compiler optimisations targeting Arm architectures by driving sound technical decisions that maximise performance and long-term value.
  • Mentor engineers, inside the LLVM team as well as in the community.
  • Represent Arm in the LLVM ecosystem, leading upstream contributions, influencing community direction, and building alignment with partners.
  • Partner across other internal Arm teams to define priorities, ensure technical alignment, and deliver integrated solutions that support Arm’s roadmap.
  • Champion process and quality improvements in development workflows, profiling methodologies, and performance benchmarking.

Required Skills and Experience:

  • Excellent programming skills in C/C++.
  • LLVM open source community citizenship, including code commits and reviews.
  • Hands-on experience in analysing performance bottlenecks.
  • Experience in low-level software or hardware development that requires looking at computer architecture specifications, such as compilers, debuggers, models, etc.
  • Solid understanding of computer architecture, Aarch64 is preferred.
  • Proficiency in software development and methodologies (coding, testing, debugging, reviewing).
  • Effective communication skills to influence internal or external partners.
  • Collaboration across teams and sites.
  • Proactive with strong problem-solving ability.

“Nice To Have” Skills and Experience:

  • Experience with Profile Guided Optimization (PGO).
  • Familiar with Agile software development methodology such as Scrum or Kanban.
  • Familiar with Linux performance analysis tools and system level performance tuning.
  • Familiar with build systems and CI

In Return:

You will work directly with upstream communities, contributing to language implementations used by millions of developers worldwide. You will have the opportunity to learn about the latest Arm architecture features, working closely with highly skilled engineering teams on ground-breaking technology. You will be empowered to continually identify and roll out improvements to our ways of working.

#LI-JG1

Accommodations at Arm

At Arm, we want to build extraordinary teams. If you need an adjustment or an accommodation during the recruitment process, please email accommodations@arm.com. To note, by sending us the requested information, you consent to its use by Arm to arrange for appropriate accommodations. All accommodation or adjustment requests will be treated with confidentiality, and information concerning these requests will only be disclosed as necessary to provide the accommodation. Although this is not an exhaustive list, examples of support include breaks between interviews, having documents read aloud, or office accessibility. Please email us about anything we can do to accommodate you during the recruitment process.

Hybrid Working at Arm

Arm’s approach to hybrid working is designed to create a working environment that supports both high performance and personal wellbeing. We believe in bringing people together face to face to enable us to work at pace, whilst recognizing the value of flexibility. Within that framework, we empower groups/teams to determine their own hybrid working patterns, depending on the work and the team’s needs. Details of what this means for each role will be shared upon application. In some cases, the flexibility we can offer is limited by local legal, regulatory, tax, or other considerations, and where this is the case, we will collaborate with you to find the best solution. Please talk to us to find out more about what this could look like for you.

Equal Opportunities at Arm

Arm is an equal opportunity employer, committed to providing an environment of mutual respect where equal opportunities are available to all applicants and colleagues. We are a diverse organization of dedicated and innovative individuals, and don’t discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

Power the Future on Arm

Working in software engineering at Arm is about shaping a future of technology for which we don't yet have words. Our engineers lead innovation in physical IP, AI and machine learning, cloud architecture, automotive tech, and every aspect of computing that matters.

Spanning software's full spectrum, from compilers to AI-powered IoT and beyond, your code can enable virtually anything to be produced on silicon. Whether you're developing award-winning VR gaming or life-enhancing medical equipment, you can improve the lives of millions by being your brilliant self at Arm.

Drive change on Arm

At Arm, you'll influence 95% of the world's connected devices and all their applications. From healthcare and infrastructure to virtual reality, you'll affect nearly all industries worldwide, racing toward new milestones and achievements together.

Revolutionary Benefits

Health and Wellness

We create a safe space for you to nurture both your physical and mental wellbeing.

Work and Life Success

We empower people to experience life beyond the boundaries of standard work patterns.

Financial Rewards

We provide benefits beyond a competitive salary to reward our people for their dedication and contributions.

Development and Support

We foster professional and personal development, building a supportive community where everyone can thrive.

Life at Arm

Life in the office doesn't get any better — especially when those offices are as sleek as ours and the people there are creative and compassionate. Combine that with our popular 'we, not I' mindset, and you enjoy the kind of teamwork and togetherness rarely found elsewhere. We share so much in common, not least the same passion for progress, but we also welcome each other's diversity. Ultimately, we love to inspire and be inspired every day.

Discover Life at Arm

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