Compiler Engineer - LLVM / C/C++ / CPU

Compiler Engineer - LLVM / C/C++ / CPU

About the role

Our client, a leading global technology company, is looking for a proactive Compiler Engineer to join its compiler and runtime libraries team, working with colleagues across the UK and international research hubs.

You will tackle complex real-world compute challenges in server, HPC and AI domains. You will analyse binary performance, apply cutting-edge compiler passes, resolve deep toolchain issues and collaborate in a multicultural team to deliver high-impact software, with opportunities to contribute your work back to leading open-source projects.

What you will be doing:

• Extending and enhancing LLVM-based compilers to support emerging hardware and instruction set features
• Architecting and implementing advanced optimisation passes for next-generation xPU architectures
• Exploring and integrating AI/ML techniques to drive intelligent, auto-tuning compiler optimisations
• Rigorously analysing the efficiency and performance of compiler-generated machine code
• Partnering directly with hardware co-design and xPU architecture teams to influence future silicon and software design

Your background:

• A genuine passion for compiler construction, code generation and low-level software engineering
• Advanced programming fluency in C and C++
• A solid understanding of modern CPU or xPU hardware architectures

Desirable skills:

• BSc, MSc or equivalent degree in Computer Science or a related technical discipline
• A proven track record of contributions to open-source software communities or compiler codebases
• Strong self-directed learning, hands‑on execution skills and curiosity to tackle complex engineering problems
• Clear communication skills and a collaborative approach in distributed, multi-disciplinary teams

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