Latest LLM Engineer Jobs

Software Engineer, Back End - Video Generation (Tech Lead Level)

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US.As AI continues to shape...

Synthesia London, United Kingdom

Remote Permanent

Senior Python Engineer (AI Systems)

This role involves designing and scaling AI systems for evaluating knowledge and skills, using large language models, evaluation frameworks, and multimodal data. You'll work in a small, collaborative team focused on building robust, fair, and reliable systems that have a real-world impact on professional certification and assessment.

S Knights Recruitment Shadwell, London, E1W 3DJ, United Kingdom £60,000 – £90,000 pa

Remote Permanent

Staff Software Engineer, Voices

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US.As AI continues to shape...

Synthesia London, United Kingdom £50,000 – £70,000 pa

Remote Permanent

Senior Software Engineer - Trusted Enterprise Platform

As a Senior Software Engineer on the Trusted Enterprise Platform team, you will build and maintain critical backend services that ensure security, compliance, and scalability. Your role involves developing authentication, SSO, notification systems, and preference management, while mentoring junior engineers and driving architectural decisions.

Multiverse London, United Kingdom £50,000 – £90,000 pa

Hybrid Permanent

Principal AI Engineer

About us PhysicsX is a deep-tech company with roots in numerical physics and Formula One, dedicated to accelerating hardware innovation at the speed of software. We are building an AI-driven simulation software stack for engineering and manufacturing across advanced industries....

PhysicsX London, United Kingdom

Lead GenAI Full Stack Engineer / Managing Consultant

This role involves working closely with senior stakeholders to develop and scale GenAI solutions, including proof-of-concepts and production-ready applications. You will collaborate on full stack development, infrastructure design, and explore emerging technologies to create scalable and secure solutions for clients.

83zero London, United Kingdom £77,000 – £88,000 pa

Hybrid Permanent Clearance Required

Cloud Application Security Engineer

This role involves working at the intersection of cloud, application security, and modern platform engineering. You will help design and secure scalable, multi-tenant systems, integrate security into CI/CD pipelines, and work closely with engineering teams to embed security principles. The company values training and development, making it a great opportunity for growth.

REVYBE IT RECRUITMENT LIMITED Manchester, United Kingdom £80,000 – £90,000 pa

Hybrid Permanent Flexible

Senior Full-stack Python Typescript AI Engineer

This role involves designing, building, and optimizing scalable backend services and APIs for a SaaS platform with a focus on AI-driven components. You will work on RAG pipelines, vector databases, semantic search, and data modeling, while ensuring security, performance, and reliability. Collaboration with a cross-functional team is key, and you will contribute to best practices in development, testing, and deployment.

TEKsystems London, United Kingdom £40,000 – £60,000 pa

On-site Contract

Technical Deployment Lead, Forward Deployed Engineering - London

About the teamOpenAI’s Forward Deployed Engineering team partners with customers to turn research breakthroughs into production systems. We operate at the intersection of customer delivery and core platform development.About the RoleThis is a founding role. As a Technical Deployment Lead...

OpenAI London, United Kingdom

Hybrid Permanent

Senior Developer

This role involves developing and maintaining software applications using Java, implementing AI solutions to enhance functionality and accelerate workflows, and collaborating with cross-functional teams to design and ship new features. The Senior Software Engineer will work with cutting-edge AI tools like Claude Code, GitHub Copilot, and LLMs to modernize legacy services and demonstrate the potential of AI in the software development lifecycle.

Tiro London, City And County Of the City Of London, United Kingdom £500 – £550 pd

Hybrid Contract

Applied Scientist, AGI Information

We are looking for a researcher in cutting-edge LLM technologies for applications across Alexa, AWS, and other Amazon businesses. In this role, you will innovate in the fastest-moving fields of current AI research, in particular in how to integrate a...

Amazon Cambridge, United Kingdom

Permanent

ML Lead - London, UK

The ML Lead will manage a team and lead the development of advanced AI systems, including autonomous agents and LLM applications. Responsibilities include team leadership, building RAG pipelines, fine-tuning LLMs, designing ETL/ELT pipelines, and ensuring responsible AI practices.

Randstad Technologies Recruitment London, United Kingdom £400 – £500 pd

Hybrid Contract

AI Developers

You will design and build AI-powered features using modern LLM frameworks, develop and optimize RAG pipelines, and integrate AI services into existing backend systems. This role involves working with structured and unstructured data, collaborating with cross-functional teams, and contributing to architecture decisions to ensure the performance, scalability, and reliability of AI systems in production.

True North Group Newcastle upon Tyne, United Kingdom £50,000 – £80,000 pa

Hybrid Permanent

Solution Architect/ AI Manager

This role involves leading the design and build of an AI-powered data platform, overseeing end-to-end solutions from data ingestion to advanced GenAI model deployment. Responsibilities include technical direction, engineering excellence, stakeholder management, and evaluating emerging technologies to drive innovation.

Randstad Technologies Recruitment London, United Kingdom £450 – £480 pd

Hybrid Contract Clearance Required

Data Scientist

As a Data Scientist, you will design and deploy machine learning solutions, particularly focusing on Large Language Models (LLMs), for a high-profile financial institution. Your responsibilities include building and deploying ML and LLM-based solutions, preparing and engineering data, fine-tuning and optimizing models, and developing scalable data pipelines across cloud systems.

Franklin Bates London, United Kingdom £55,000 – £65,000 pa

Hybrid Permanent Flexible