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Senior Software Engineer — Runtimes and Architecture

Job ID 2026-17171 Date posted Jul. 06, 2026 Location Cambridge, United Kingdom; Manchester, United Kingdom Category Software Engineering Apply

We are looking for a flexible, inquisitive engineer with an interest in compilers, language runtimes, and CPU architecture. In this role, you will study existing, new and proposed extensions to the Arm architecture to determine their applicability and optimal use by a variety of modern language runtimes and compilers. You will work with Arm architects to help shape future architecture features, and with runtime engineers to ensure they are used effectively in real-world language implementations. The technologies covered include Java, JavaScript, Python, Rust, WebAssembly and more.

You'll be part of the bigger CE-SW Runtimes team, whose goal is to improve modern languages support on the Arm architecture, from JavaScript to Rust. You will work closely with the team and colleagues across the organisation and with open-source communities to tackle challenges in enabling the future of computing.

Responsibilities

  • Analyse architecture features and find opportunities for their use in language runtimes and compilers.
  • Work with architects to suggest or improve proposals, as appropriate.
  • Own and be accountable for specific investigations, with guidance where appropriate.
  • Collaborate with colleagues across Arm to improve the Arm architecture, and to ensure it is effectively used.
  • Contribute to open-source software projects and engage with open-source communities.
  • Contribute to documentation efforts (including internal documentation and external blog posts) to communicate findings.
  • Help develop tooling and automation to support the above activities.

Required skills and experience

  • A flexible, problem-solving approach, and a commitment to extend the breadth and depth of knowledge.
  • Experience working on language runtimes, compilers or similar technologies.
  • Strong programming skills in at least one of C, C++ or Rust.
  • Familiarity with concepts of computer architecture and microarchitecture, such as cache hierarchies and CPU pipelines, preferably relating to AArch64.

Nice-to-have skills and experience

  • Proficiency in one or more of Java, JavaScript, Python, Rust or WebAssembly.
  • Familiarity with assembly language and low-level development for AArch64.
  • Familiarity with Linux performance analysis tools and system-level performance tuning.
  • Familiarity with build systems and CI.
  • Experience contributing to open-source projects.

In return

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

If skilled worker sponsorship is required, Arm will meet costs associated with sponsorship for the employer only. All fees associated with the individual’s application e.g. visa application fee and Immigration Health Surcharge, will be the responsibility of the successful candidate.

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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.

Salary Range:

£73,500 - £99,500 per year

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 100% 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 in them are innovative and supportive. Combine that with our focus on delivering as One Arm, and you’ll experience the kind of collaboration and togetherness that’s rare to find elsewhere. We share so much in common, not least a passion for progress, but we also celebrate each other's diversity.

Discover Life at Arm

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