Latest LLM Engineer Jobs

Senior MLOps Engineer - DSX Enablement

Develop and optimize AI infrastructure solutions on NVIDIA's NeoCloud and partner platforms, focusing on distributed training, inference, and MLOps pipelines. Serve as a technical advisor for internal and external customers, diagnosing full-stack AI/ML system issues and contributing to open-source tools. Collaborate with engineering teams to enhance accelerated frameworks and support new hardware integration.

NVIDIA PLN 292,500 – PLN 650,000 pa

Senior MLOps Engineer - DSX Enablement

This role involves building and deploying scalable AI solutions on cloud platforms, with a focus on MLOps pipelines, distributed training, and inference optimization. You'll act as a technical advisor for internal and external customers, solving complex full-stack AI system issues and contributing to open-source tools. The position emphasizes deep systems knowledge, performance tuning, and collaboration with infrastructure teams to support cutting-edge AI workloads.

NVIDIA PLN 292,500 – PLN 650,000 pa

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

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

Forward Deployed Engineer - Cardiff

This role involves leading the design, development, and deployment of AI-powered solutions such as automation, RAG, and LLM-based workflows. The engineer will collaborate with stakeholders to deliver strategic AI initiatives, ensure systems are secure and scalable, and mentor a growing engineering team. The position is based in central Cardiff with hybrid working and focuses on building advanced AI capabilities within a technology-driven organisation.

Circle Recruitment Cardiff, Cymru / Wales, CF10 2AF, United Kingdom £45,000 – £53,000 pa

Hybrid Permanent

Senior Product Engineer

This role involves building and scaling an AI-powered behavioural intelligence platform, focusing on LLM-enabled features and RAG workflows. The engineer will own product architecture and development, working closely with leadership to shape the roadmap. It's a high-impact position in a funded startup transitioning from proof-of-concept to commercial deployment.

Harnham - Data and Analytics Recruitment London, United Kingdom £110,000 – £140,000 pa

Analytics Engineer

This role involves designing, building, and maintaining data models using dbt and BigQuery, working closely with Data Engineering and analysts to ensure scalable and high-quality data products. You will also implement data quality practices, support AI/LLM tools, and optimize query performance.

Harnham - Data and Analytics Recruitment London, United Kingdom £75,000 – £80,000 pa

Senior AI Engineer

Design and implement end-to-end AI/ML systems using generative AI, LLMs, and agentic frameworks to extract insights from biomedical literature and data. Focus on production-grade reliability, model quality, and collaboration with product and engineering teams to deliver user-facing features. Mentor junior engineers and contribute to a culture of technical excellence and knowledge sharing.

Causaly London, United Kingdom

Hybrid Permanent

AI Engineer - Startups & Partnerships - Citi

As an AI Engineer on Citi's Startups & Partnerships team, you will build and deploy production-grade AI applications, evaluate emerging AI technologies, and integrate solutions across the enterprise stack. You'll work closely with business stakeholders and startups to rapidly prototype and deliver impactful AI solutions at a global scale.

eFinancialCareers Belfast, United Kingdom

Senior Software Engineer, Chem-Bio

Design and build core platform systems to support technical research on AI-related chemical and biological risks, translating ambiguous research needs into scalable, maintainable software solutions. Work within a multidisciplinary team to develop LLM-based agent systems, evaluation frameworks, and shared infrastructure while mentoring engineers and shaping technical direction. Operate in a high-impact environment with direct influence on AI policy and global governance.

AI Security Institute London, United Kingdom

On-site Permanent Clearance Required

Senior Software Engineer – Python

As a Senior Software Engineer in Medtronic's AI and Data Science Platform team, you will design, build, and maintain software solutions that enable machine learning engineers and data scientists to develop new products. You will work on a SaaS tool for project, data, and annotation management, collaborate with data and platform engineers, and ensure high-quality, scalable software delivery.

Medtronic London, United Kingdom £76,800 – £115,200 pa

Senior ML Engineer, Doc Fraud

This role involves developing and optimizing machine learning systems for document classification and extraction, with a focus on fraud detection in identity verification. The engineer will work on production-scale LLM and traditional ML pipelines, improving accuracy and performance across global document types. Collaboration with cross-functional teams and mentorship of junior engineers are key aspects of the position.

Entrust London, United Kingdom

Hybrid Permanent

Senior ML Engineer, Doc Fraud

Design and build production-grade machine learning systems for document classification and extraction, focusing on high accuracy and scalability across global identity documents. Work with LLMs and traditional ML models, optimize inference pipelines, and collaborate with cross-functional teams to enhance fraud detection and customer onboarding. Emphasis on technical leadership, system reliability, and mentoring within a squad-based engineering culture.

Entrust

Hybrid

Senior Security Engineer (AI Safety), London, Lausanne

This role involves securing AI-first drug discovery platforms by designing risk frameworks, protecting ML model artifacts, and implementing security controls across distributed training and inference systems. The engineer will lead AI-specific incident response, develop guardrails for LLMs and autonomous agents, and ensure compliance with global regulations like the EU AI Act. Close collaboration with ML researchers and platform teams is essential to embed security into the full AI lifecycle while advancing AI safety standards.

Isomorphic Labs United Kingdom

Hybrid Permanent

Applied AI Engineer, Codex Core Agent

About the TeamThe Codex Core Agent team builds the kernel of Codex. We own making the agent better, accelerating research, and making those improvements real in production for our users.That means working across the systems that make Codex actually function...

OpenAI London, United Kingdom

Permanent