Machine Learning Jobs

Research Engineer, Machine Learning (Reinforcement Learning)

Blends reinforcement learning research with engineering, building scalable RL infrastructure, distributed training across GPU clusters, and novel training environments for agentic LLMs. Involves profiling, optimization, caching, and debugging distributed systems, with close collaboration between research and production teams.

Anthropic London £260,000 – £630,000 pa

On-site Permanent

Manager, Applied AI Architects - Digital Natives, EMEA

Lead and grow a distributed EMEA team of Applied AI Architects, setting pre-sales standards and acting as technical lead on strategic digital-native accounts. The role involves use-case scoping, POCs, demos and ROI validation for Claude Enterprise, Claude Code and the Claude API, while guiding customers through GDPR, EU AI Act and data residency requirements alongside Sales, Product and Engineering.

Anthropic London £190,000 – £230,000 pa

Hybrid

Research Leader (Toxicology), Cambridge, MA

Lead the safety assessment strategy for small molecule and biologic drug discovery projects from inception to regulatory submission, designing screening cascades and mechanistic experiments. Partner with machine learning researchers to build predictive toxicology models and manage external CROs for all wet-lab data generation, while mentoring junior scientists.

Isomorphic Labs Cambridge, United States

Hybrid

Research Engineer (LLM Performance), London

Join the model performance and scaling team to implement and optimize LLM post-training methods on frontier models, working with research teams to turn new methods into production systems. The role focuses on distributed training and inference performance, low-precision methods, and frameworks like JAX or PyTorch, in a hybrid London setting.

Isomorphic Labs London

Hybrid

Machine Learning Engineer

This role involves developing end-to-end machine learning systems integrated with advanced electronics for defence and security applications. You'll work across diverse domains such as computer vision and generative models, rapidly prototyping and deploying models into functional hardware systems. The role emphasizes innovation, rapid iteration, and close collaboration in a technically driven, low-management environment.

ECM Selection Cambridge £40,000 – £70,000 pa

On-site Permanent Clearance Required

Expression of Interest- Chem Bio

Open expression of interest for research engineers and scientists to join a team assessing chemical and biological risks from frontier AI. Work includes designing capability evaluations, building benchmarks and datasets, threat modelling, and developing safeguards, with findings shared with AI companies and government.

AI Security Institute London £65,000 – £145,000 pa

Hybrid Clearance Required

Graduate Software Engineer

Engineer the future of defence and securityThis team is motivated by saving lives in war affected regions and on the battlefield. They believe that by combining advanced technologies from different sectors they can fundamentally change the effectiveness of those we...

ECM Selection Cambridge £35,000 – £45,000 pa

Senior Software Engineer, Chem-Bio

Senior individual contributor building the shared platform, tooling and infrastructure for an interdisciplinary chem-bio research team, including LLM-based agent systems and evaluation frameworks. Works closely with researchers to translate varied needs into maintainable Python systems, while contributing to engineering standards and mentoring peers without line management.

AI Security Institute London

Hybrid

Enterprise Account Executive - Manufacturing

As an Enterprise Account Executive, you will focus on growing Databricks' presence in the Manufacturing industry by developing strong relationships with key accounts, leading sales campaigns, and co-developing business plans with partners. You will drive the adoption of big data and AI solutions, working closely with customers and ecosystem partners to achieve strategic goals.

Databricks London

MLE, Data Enrichment

Builds ground-truth datasets and computer vision classifiers that describe complex driving scenes, spanning road geometry, spatial relationships, road users and driving behaviour. Works with internal customers to define annotation tasks and acceptance criteria, curates datasets, and integrates classifiers with enrichment infrastructure for corpus analysis and scenario mining.

Wayve London

Hybrid Permanent

Software Engineer (Agentic Systems)

Design and build LLM-agentic workflows that reason over knowledge graphs, proprietary methods and scientific literature to generate and triage therapeutic hypotheses for rare diseases. Works closely with drug discovery scientists in a cross-functional team, using Python, ADK and AgentSpace, with scope to own workflows end to end.

Healx Cambridge

Hybrid Permanent

Principal Applied Scientist, Trusted Supply, Amazon Ads

Lead the science vision for Trusted Supply, safeguarding advertiser trust across Amazon Advertising by developing algorithms for brand safety, suitability scoring, fraud detection, viewability prediction and privacy-preserving measurement. The role spans multi-year research direction, publication roadmaps, cross-team modelling frameworks and production systems serving billions of ad impressions daily, alongside hiring and mentoring applied scientists and research engineers.

Amazon London

Permanent

Solutions Architect

Lead the technical strategy for enterprise accounts, owning architecture discussions from discovery through production deployment and consumption growth. Design scalable solutions across data engineering, ML/AI and real-time analytics, acting as a trusted advisor to customer architects and engineering leads while developing a declared technical specialization.

Databricks London

Research Fellow in AI/ML (Artificial Intelligence / Machine Learning)

Postdoctoral role delivering research on innovative AI/ML algorithms for predictive modelling and optimisation of agricultural applications using heterogeneous data, as part of an Innovate UK-funded collaborative project. Duties include developing AI/ML software tools, data management and analysis, supporting the Principal Investigator on project milestones, and contributing to publications and reports.

University of Hertfordshire Hatfield £39,560 – £46,970 pa

On-site Contract Clearance Required

Senior ML Compiler Engineer

Develop the machine learning compiler stack for custom AI accelerator hardware, enabling leading performance of the latest LLMs. Work with hardware, driver runtime and ML engineers in a hardware-software co-design methodology, defining the IR, lowering strategy, optimisation passes and execution model from first principles.

Fractile London

Clearance Required