Harnham
LLM Engineer
LLM Engineer at Harnham, based in London. This is a contract role.
- Pay
- Not given by the employer
- Hours and contract
- Contract · On site
- Location
- London
- Closing date
- Sector
- IT & Software
Reference https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-llm-engineer-lo
About the role
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LLM Engineer
Remote (UK) | Outside IR35 | £500-£600 per day
This is an opportunity to join a high-impact AI programme focused on developing production-grade Large Language Model solutions. You will play a key role in designing and delivering cutting-edge generative AI applications, working on projects that have a direct impact on business operations and customer experience.
The Company
They are a technology-driven organisation investing heavily in artificial intelligence and machine learning. Their teams are focused on building innovative products and services that leverage the latest advancements in generative AI. Operating within a collaborative and agile environment, they are looking for an experienced contractor to accelerate the delivery of key AI initiatives.
The Role and Deliverables
- Design, develop, and deploy LLM-powered applications for production environments.
- Build and optimise Retrieval-Augmented Generation (RAG) pipelines and supporting infrastructure.
- Integrate LLM solutions with vector databases, APIs, and cloud-based services.
- Evaluate, monitor, and improve model performance through testing and optimisation.
- Collaborate with data scientists, engineers, and business stakeholders to deliver scalable AI solutions.
- Produce technical documentation and best practice guidance to support ongoing development.
Your Skills & Experience
- Strong experience building and deploying Large Language Model applications.
- Strong Python development skills and experience with frameworks such as LangChain, LlamaIndex, or similar.
- Experience implementing RAG architectures and working with vector databases.
- Strong understanding of prompt engineering, model evaluation, and AI application optimisation.
- Experience deploying solutions within AWS, Azure, or GCP environments.
- Familiarity with MLOps practices, CI/CD pipelines, and software engineering best practices.
- Ability to work independently and communicate effectively with both technical and non-technical stakeholders.
How to Apply
If you are an experienced LLM Engineer looking for a 6-month contract opportunity, apply with your latest CV for immediate consideration.
To Apply for this Job Click Here
Reference: https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-llm-engineer-lo · Posted 1 week ago · Closes 6 Dec 2026 · Listed via Harnham
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