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Senior ML Compiler Engineer

This role involves developing the machine learning compiler stack for Fractile’s custom AI acceleration hardware, focusing on enabling high-performance execution of large language models. The engineer will work closely with hardware, runtime, and ML teams in a co-design environment to shape the compiler’s IR, optimisation passes, and lowering strategies. It's a foundational opportunity to define the architecture of a new full-stack execution engine from the ground up.

Fractile

Bristol, United Kingdom

Hybrid Permanent

ML Runtime Engineer (Mid-Level and Senior)

Design and develop high-performance runtime systems for AI accelerators, integrating with open-source ML frameworks like PyTorch and vLLM. Work closely with hardware and software teams in a co-design environment to optimise inference performance. Build core infrastructure in Rust and contribute to the full stack of ML runtime technologies.

Fractile

Bristol, United Kingdom

£100,000 – £200,000 pa On-site Permanent

Lead AI Researcher

The Lead AI Researcher will lead the development and deployment of cutting-edge deep learning systems for high-stakes defence and national security applications. This founding role involves solving ambiguous, mission-critical problems from concept to production, designing advanced AI models, and establishing engineering standards and tooling for a world-class team. Day-to-day work includes close collaboration with leadership to translate operational needs into technical solutions, training and deploying frontier models, and building robust ML infrastructure in a rigorous, security-conscious environment.

Kangal AI

London, United Kingdom

£85,000 – £125,000 pa Hybrid Permanent

Senior Data Engineer

This role involves designing, building, and operating scalable batch and streaming data pipelines that transform vast, unstructured exposed data into reliable, queryable intelligence. The Senior Data Engineer will own end-to-end data workflows, ensure data quality and model readiness, and collaborate closely with ML teams on feature engineering. The position is central to enabling analytics and AI capabilities on a platform that detects corporate data exposure across supply chains.

Lab 1

London, Greater London, United Kingdom

Hybrid Permanent

Senior AI Engineer

This role involves leading a two-year R&D project to develop emotionally responsive virtual humans for soft-skills training. Responsibilities include setting technical direction, building AI systems that perceive and respond naturally, and collaborating across multiple disciplines to turn research into a reliable product.

Bodyswaps

London, United Kingdom

Hybrid Permanent Flexible Clearance Required

Computer Vision Engineer

Develop and deploy advanced computer vision systems for high-stakes defence applications, bridging cutting-edge research with real-world deployment. Lead technical strategy, mentor teams, and contribute to business development through bids and client engagement. Work in a hybrid model with regular on-site client collaboration across the UK.

Faculty AI

London, United Kingdom