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Senior Software Engineer — Runtimes and Architecture

Arm -
Manchester

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Job details

£73,500 - £99,500 a year

Qualifications

Performance tuning
Rust (programming language)
Build automation
Continuous integration
Software development
ARM

Full job description

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

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.

#LI-KD1

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 [email protected]. 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.

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£99,500

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