Arm Performance Runtime Engineer (Open Source)

Arm; Cambridge; On-site; GBP 97,300 - 131,700; Full time

Job summary

Arm is seeking an experienced performance engineer to advance compilers and managed runtimes on Arm. You will optimize language runtimes for Java, JavaScript, Python, Rust and more, profiling to remove bottlenecks and collaborating with hardware teams.

This role offers the chance to contribute to open‑source projects, work with upstream communities, and influence architecture features while delivering high‑impact performance improvements.

Qualifications

• Experience with managed runtimes and compilers.
• Strong programming skills in C/C++.
• Familiar with performance analysis at a low level.
• Interest in CPU pipelines and cache hierarchies.
• Solid software development practices.

Responsibilities

• Identify and implement changes to compilers and runtimes to boost performance.
• Profile workloads to find bottlenecks and optimize features.
• Collaborate across Arm to improve architecture and CPU support.
• Develop runtime or compiler features and tune existing ones.
• Contribute to open‑source projects and engage with the community.
• Help build automated functionality and performance tests.

Skills

Managed runtimes

Compilers

C/C++ programming

Performance analysis

Computer architecture

Tools

Linux profiling tools

CI/build systems

Job description

Arm is seeking an experienced performance engineer to advance compilers and managed runtimes on Arm. You will optimize language runtimes for Java, JavaScript, Python, Rust and more, profiling to remove bottlenecks and collaborating with hardware teams.

This role offers the chance to contribute to open‑source projects, work with upstream communities, and influence architecture features while delivering high‑impact performance improvements.