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

European Tech Recruit; Cambridgeshire and Peterborough; On-site; GBP 70,000 - 110,000; Full time

Job summary

European Tech Recruit is seeking a Compiler Engineer to join its client’s team in the UK. The role focuses on LLVM-based compiler development, code generation for CPUs and emerging xPU hardware, and performance analysis.

You will implement optimisation passes, explore AI/ML driven tuning, and collaborate with hardware teams to influence silicon and software design. Strong C/C++ skills and a passion for compiler construction are essential.

Qualifications

• Passion for compiler construction and code generation.
• Advanced programming fluency in C and C++.
• Strong understanding of modern CPU/xPU architectures.

Responsibilities

• Extend LLVM-based compilers to support new hardware features.
• Architect advanced optimisation passes for next-gen xPU architectures.
• Explore AI/ML techniques to drive auto-tuning compiler optimisations.
• Analyse efficiency and performance of generated machine code.
• Collaborate with hardware teams to influence silicon/software design.

Skills

Compiler construction

Code generation

Low-level software engineering

C/C++ proficiency

LLVM

Education

BSc/MSc in CS

Tools

LLVM

Job description

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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