Latest Large Language Models (LLM) Jobs

Senior Network Solution Architect

This role involves designing and delivering end-to-end networking solutions that integrate NVIDIA GPUs and networking technologies for cloud, AI, HPC, and enterprise customers. The architect will define reference architectures, lead technical pre-sales engagements, respond to RFPs, conduct product demonstrations, and provide technical leadership during complex deployments. Close collaboration with sales, engineering, and product marketing teams ensures customer requirements inform product development and strategy.

NVIDIA Cambridge, United Kingdom

Senior Network Solution Architect

Design and implement end-to-end data center networking solutions integrating NVIDIA GPUs and networking technologies for cloud, HPC, telco, and enterprise clients. Lead technical pre-sales engagements, develop custom proofs-of-concept, and support complex deployments while providing feedback to engineering teams on product improvements. Focus on AI factories, LLMs, and high-performance networking architectures.

NVIDIA Reading, United Kingdom

AI Security Software Engineer (GenAI & LLM Security)

This role involves designing and building secure platforms to protect enterprise Generative AI and Large Language Model (LLM) applications from emerging threats such as prompt injection and adversarial inputs. The engineer will develop automated security testing frameworks, create robust APIs, and contribute to cloud-native, distributed systems operating at scale. Collaboration with global engineering, cybersecurity, and operations teams is central, with an emphasis on shaping secure AI adoption through resilient software design and best practices in AI security and DevSecOps.

83zero London, City And County Of the City Of London, United Kingdom £85,000 – £90,000 pa

Hybrid Permanent

Software Engineer (LLM Engineering), London

This role involves building and scaling LLM-integrated systems to support AI-driven drug discovery. You'll design secure, scalable infrastructure, develop agentic tooling and RAG systems, and collaborate with scientists to translate research needs into technical solutions. The position emphasizes first-principles thinking and innovation in generative AI applied to complex biological data.

Isomorphic Labs London, United Kingdom

Researcher, Training - London

A research-focused role advancing large language model development through architecture innovation, optimization, and scaling. The position involves designing and evaluating novel model architectures, debugging training regressions, and improving both model and computational performance. Work is integrated within a hybrid (3 days in-office) setup in London, contributing to core training infrastructure and flagship AI systems.

OpenAI London, United Kingdom

Hybrid Permanent

AI Engineer

Design and build generative AI applications, intelligent assistants, and automation solutions using LLMs, RAG, and agentic AI frameworks. Work within a major enterprise AI programme for a global bank, integrating AI services via APIs and cloud platforms while supporting engineering teams in adopting cutting-edge AI technologies. Focus on real-world deployment of copilots and AI-driven workflows.

DCV Technologies London, United Kingdom £600 – £650 pd

Hybrid Contract Clearance Required

AI Application Developer

Design and deploy Agentic AI and Generative AI solutions using LLMs, AI agents, and orchestration frameworks like LangChain and CrewAI. Build scalable, cloud-native applications with RAG pipelines, prompt engineering, and real-time intelligence capabilities. Integrate diverse data sources and collaborate with engineering teams in a regulated financial services environment.

Hays Technology London, United Kingdom £450 pd

Senior AI Developer

Design and deliver production-grade AI solutions integrating large language models, agentic systems, and Azure AI services for client-facing projects. Lead technical implementation across full-stack environments, architect LLM-powered features, and establish reusable patterns and tools. Mentor developers and contribute to research, prototyping, and technical proposals in a consultancy setting.

Reed Technology Reading, Berkshire, United Kingdom £80,000 – £85,000 pa

Hybrid Permanent

Senior AI Engineer - Perm UK

Design and build scalable AI data pipelines and cloud-native systems to productionise machine learning and NLP models. Collaborate with data scientists and engineers to transform research into secure, high-performance AI services using modern MLOps practices. Work with cutting-edge technologies including LLMs, vector databases, and retrieval-augmented generation in a remote-first, innovation-driven environment.

Infused Solutions London, United Kingdom £65,000 – £80,000 pa

Remote Permanent

Research Engineer, Machine Learning (Reinforcement Learning)

This role involves advancing reinforcement learning in large language models, focusing on developing agentic systems for computer use, code generation, and reasoning. The engineer will build scalable RL infrastructure, design training environments, and collaborate across research and engineering to implement safety and performance improvements at scale.

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

Applied AI Engineer

Applied AI Engineer (C# .NET) - Nottingham - Hybrid (2 days a week in office) - £80,000We're working with an ambitious technology company developing intelligent software products used by thousands of customers across the UK and internationally. They're investing heavily...

Oscar Technology Nottingham, United Kingdom £70,000 – £80,000 pa

Senior ML Engineer

Design and deploy production-grade NLP systems and large language models tailored for financial services, with a focus on scalability, data governance, and regulated environments. Develop fine-tuned, low-latency AI workflows integrated into cloud infrastructure, while mentoring engineers and advancing evaluation methodologies for LLM outputs. Work across the full ML lifecycle from research to deployment in a remote-first, innovation-driven team.

Aveni United Kingdom

Remote Permanent

Research Engineer, Pretraining Scaling - London

This role involves owning critical parts of Anthropic's production pretraining pipeline for large language models, focusing on reliability, performance optimization, and debugging across hardware, networking, and training dynamics. The engineer will run experiments to improve training efficiency, respond to incidents during model launches, and collaborate closely with research and systems teams. It’s a high-impact, operational role blending deep technical engineering with empirical research in a fast-paced, safety-focused AI environment.

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

Senior Data Scientist

This role involves designing and deploying Generative AI and LLM-based solutions for synthetic data generation and data augmentation. You will work closely with Product and Engineering to take models from experimentation to production, ensuring data quality and reliability, and communicating technical concepts to non-technical stakeholders.

Harnham - Data and Analytics Recruitment London, United Kingdom £80,000 – £95,000 pa

Remote Permanent

Sr. Data Scientist - GenAI

Lead the development and deployment of cutting-edge generative AI systems for cybersecurity, focusing on large language models and deep learning at scale. Drive research strategy, build production-ready AI solutions processing trillions of daily events, and provide technical leadership across cross-functional teams. Contribute to AI innovation through publications and thought leadership while shaping best practices in responsible AI adoption.

CrowdStrike England

Remote Permanent