Senior ML Compiler Engineer

Job Title

Senior ML Compiler Engineer

Role Summary

Develop the machine-learning compiler stack for Fractile’s AI accelerators to enable high-performance inference for large language models. Work at the intersection of hardware, runtime/driver, and ML teams to define IR, lowering strategy, optimisation passes, and the execution model.

Role is office-based in London or Bristol and focuses on hardware–software co-design to maximise inference throughput and efficiency.

Experience Level

Senior — typically 4+ years industry experience in compilers, systems, or ML infrastructure.

Responsibilities

Primary responsibilities include:

• Design and implement compiler IR, lowering, and optimisation passes targeting Fractile accelerators.
• Profile, tune, and optimise LLMs to maximise performance on custom hardware.
• Integrate compiler outputs with runtime and driver software; support end-to-end execution flows.
• Write and maintain high-quality C/C++ code and development tooling for the compiler/runtime stack.
• Define testing, benchmarking, and validation processes to measure performance and correctness.
• Collaborate closely with hardware engineers in a hardware–software co-design process.

Requirements

Must-have qualifications and skills:

• Proven experience developing ML compilers using technologies such as MLIR or TVM.
• Strong C/C++ skills and familiarity with industry-standard development tools.
• Good understanding of computer architecture and performance optimisation techniques.
• Up-to-date knowledge of machine learning techniques and frameworks relevant to LLMs.
• Experience working in collaborative hardware–software teams and driving technical decisions.
• Approximately 4+ years of industry experience in compiler, systems, or ML engineering.
• Nice-to-have: prior experience at a startup or in a small engineering team.

Education Requirements

Degree in Computer Science, Electronic Engineering, Mathematics, Physics, or a related technical field (e.g., Bachelor’s or equivalent). The role expects roughly 4+ years of industry experience.

About the Company

Company: Fractile

Headquarters: London, UK

Fractile is on a mission to revolutionize AI by developing silicon, systems, and software that enable the fastest execution of advanced models at lower costs. Established in 2022, the company has rapidly expanded, fostering a collaborative culture in its London and Bristol offices. With a focus on innovation in ML/AI IC product development, Fractile combines hardware and software to deliver high-impact solutions for data center applications.