Latest LLM Engineer Jobs

Forward Deployed Engineer

This role involves embedding with strategic enterprise customers to build and deploy production AI applications using Anthropic's Claude models. The engineer will develop custom solutions like agent skills and MCP servers, provide on-site deployment support, and translate customer needs into technical implementations while maintaining safety and reliability standards. As a founding member of the Forward Deployed Engineering team, the role also shapes Anthropic’s customer deployment strategy and contributes insights back to product and engineering teams.

Anthropic London, United Kingdom £225,000 – £255,000 pa

Applied AI Engineer, Startups

As an Applied AI Engineer at Anthropic, you will serve as a technical advisor to tech-forward companies, helping them build on the Claude Developer Platform. You'll work hands-on with customer engineering teams, develop custom evaluation frameworks, and create technical resources to enable successful AI applications.

Anthropic London, United Kingdom

Senior Software Engineer

Design and build scalable, cloud-native systems and user interfaces that integrate LLM-powered capabilities into financial workflows. Work closely with AI and product teams to deliver production-ready agentic systems on AWS. Focus on event-driven microservices, React front-ends, and robust APIs using Node.js and TypeScript.

Aveni United Kingdom

Remote Permanent

Senior Deep Learning Software Engineer, Inference

Design and optimize GPU-accelerated deep learning inference software for large-scale language and generative AI models. Contribute to open-source frameworks like vLLM and SGLang, and implement performance improvements across NVIDIA's full range of accelerators from datacenter to edge. Work closely with research and engineering teams to profile, tune, and deploy state-of-the-art model serving solutions using CUDA, Triton, and other low-level optimization tools.

NVIDIA Netherlands

Senior AI Engineer - Perm Developer Productivity

This hands-on role involves identifying where AI can improve developer productivity, building and integrating AI tooling into existing workflows, and measuring the impact of these tools. You'll work closely with a large engineering team to implement and evaluate AI solutions in real-world codebases.

SRG M25Pd, United Kingdom £100,000 pa

Senior AI Engineer

Lead the design and deployment of scalable AI and generative AI solutions, including LLM-based applications for enterprise search, document summarization, and conversational AI. Drive innovation through retrieval-augmented generation (RAG) architectures and mentor engineering teams in transformer models and prompt engineering. Collaborate across data, ML, and business teams to deliver measurable impact using cloud AI platforms and MLOps practices.

Appcast Enterprise Cork, United Kingdom

Senior Engineering Manager

Lead the engineering team behind Multiverse's Diagnose & Prescribe (D&P) system, which assesses skill gaps and guides learners and employers to the right apprenticeships. You'll own technical direction, team health, and delivery across AI-driven services including RAG, LLM-scored assessments, eligibility logic, and onboarding flows. Work closely with Product, Design, and GTM to shape an AI-native platform while evolving services out of a legacy monolith.

Multiverse London, United Kingdom

Hybrid Permanent Clearance Required

Applied AI Engineer, Quants

This role involves working directly with quantitative investment and trading firms to apply OpenAI’s models and Codex to their research and development workflows. Responsibilities include identifying valuable opportunities, building and deploying AI systems, and guiding technical decisions to ensure production readiness and customer impact.

OpenAI London, United Kingdom

Hybrid Permanent

Senior Machine Learning Engineer (Safety)

As a Senior Machine Learning Engineer, you will lead the development and deployment of cutting-edge AI systems for high-impact missions in national security and global stability. You will design, build, and deploy scalable, production-grade ML software and infrastructure, ensuring rigorous operational and ethical standards. You will also mentor junior engineers and collaborate with cross-functional teams to solve critical client challenges.

Faculty London, United Kingdom

Permanent

Senior AI Engineer

Build and ship end-to-end AI agent systems that transform how Multiverse operates, from context design and tool integration to evaluation and production operation. Work across the full stack to reinvent internal workflows and set the blueprint for AI-first companies. Use AI-assisted development with Claude Code and shape technical direction in a small, high-impact team.

Multiverse London, United Kingdom

Hybrid Permanent Clearance Required

Senior Applied AI Engineer

This role involves designing, building, and delivering backend services and APIs for an AI layer in an investment management firm's portfolio technology platform. You will work closely with a frontend engineer to integrate AI capabilities, ensure secure data handling, and monitor system performance.

Hays Technology London, United Kingdom £100,000 – £110,000 pa

Machine Learning Engineer / ML Engineer - Roleplay Sessions

Build and improve the AI engine powering interactive roleplay training with AI avatars, focusing on real-time performance scoring, feedback generation, and dynamic response logic. Work on applied machine learning models integrated into a product-driven environment, collaborating closely with engineering and product teams to enhance learning-by-doing experiences. The role emphasizes fast iteration and delivering tangible impact through scalable AI systems.

Synthesia London, Europe, United Kingdom

Permanent

Staff Full-Stack Software Engineer, (Forward Deployed), GPS

This role involves leading the design and implementation of full-stack AI applications for public sector clients, translating complex mission requirements into secure, scalable technical solutions. The engineer will work directly with government teams to build production-grade systems, integrate AI models with interactive UIs and backends, and establish reusable patterns from real-world deployments. It emphasizes architectural leadership, cloud infrastructure governance, and mentoring within high-impact, security-sensitive environments.

Scale AI London, United Kingdom

On-site Permanent Clearance Required

PhD Studentship: Mechanical engineering, fusion, digital: An AI enhanced modelling of coupled tritium breeding and heat exchange for fusion breeder blankets

This PhD project focuses on optimizing the Tritium Breeding Ratio (TBR) in fusion breeder blankets using Monte Carlo neutronics methods and AI-enhanced predictive models. The research will involve collaboration with other researchers and doctoral students, and will explore both neutronics and thermomechanical aspects of fusion reactor design.

Swansea University Swansea, United Kingdom £21 pa

On-site Contract

Principal/Staff Software Engineer

Work on core enterprise platform systems and new API development for Synthesia's AI video platform, ensuring security, scalability, and reliability. Own complex, long-term projects across multiple teams, translating business and regulatory requirements into robust technical solutions. Collaborate closely with product, security, and infrastructure teams while leveraging observability to maintain system health and compliance.

Synthesia United Kingdom US$200,000 pa

On-site Permanent