AI/ML Engineer
Up to £160,000
King's Cross, London (3 days a week)
This is an opportunity to join a well-funded AI business at a pivotal stage of growth, building production-grade AI systems that solve complex, real-world problems. You'll work on agentic AI, retrieval systems, evaluation frameworks and enterprise-scale LLM applications, with the chance to influence both technology decisions and product direction.
THE COMPANY
They are an ambitious technology business developing an AI-powered platform that helps investment professionals access information, automate complex workflows and make better decisions at scale. Their platform combines proprietary data, external sources and advanced AI capabilities within a secure enterprise environment.
Backed by an established organisation with deep domain expertise and a strong client network, they offer the agility of a startup alongside the stability and resources of a proven business. The engineering team is being built with a strong emphasis on ownership, collaboration and technical excellence.
THE ROLE
As a AI/ML Engineer, you will help design, build and operate the LLM-powered systems at the core of the platform, taking AI products from experimentation to reliable production deployment.
Specifically, you can expect to be involved in the following:
- Building multi-step AI agent workflows using modern orchestration frameworks
- Developing production-scale retrieval augmented generation (RAG) systems
- Creating evaluation frameworks, testing infrastructure and monitoring capabilities for AI applications
- Designing retrieval pipelines including embeddings, vector search, reranking and knowledge retrieval
- Working with graph-based retrieval and data modelling approaches
- Optimising AI systems for accuracy, latency, scalability and cost efficiency
- Integrating leading foundation models into production environments
- Collaborating closely with engineering leadership to shape technical direction
- Mentoring engineers and helping establish best practices for AI development at Lead level
- Contributing across the full software development lifecycle using Python and cloud-based infrastructure
SKILLS AND EXPERIENCE
The successful AI/ML Engineer will have the following skills and experience:
- Strong Python software engineering expertise
- Commercial experience developing and deploying LLM or machine learning systems
- Hands-on experience with LangGraph, LangChain or similar agent orchestration frameworks
- Strong RAG experience, including embeddings, chunking strategies, vector databases and retrieval evaluation
- Understanding of graph-based retrieval approaches or graph data modelling principles
- Experience with evaluation-led AI development, testing frameworks and regression controls
- Regular use of AI-assisted development tools such as Cursor, Claude Code or similar
- Ability to balance model performance, reliability, security and operating costs in production systems
Desirable skills include:
- Qdrant, Weaviate or pgvector
- Neo4j, GraphRAG and Cypher
- MCP server development
- LangSmith, LangFuse or similar observability platforms
- Fine-tuning, embedding model selection or open-weight model deployment
- Experience working with complex document-heavy environments
BENEFITS
The successful AI/ML Engineer will receive the following benefits:
- Salary up to £130,000 - depending on experience
HOW TO APPLY
Please register your interest by sending your resume to Majid Latif via the Apply link on this page.
AI/ML Engineer in London employer: Harnham - Data & Analytics Recruitment Careers
As a leading consumer retail organisation based in London, we pride ourselves on fostering a dynamic and inclusive work culture that champions innovation and collaboration. Our commitment to employee growth is evident through tailored development programmes and the opportunity to lead transformative digital initiatives, all while enjoying a competitive salary and bonus structure. Join us to be part of a forward-thinking team that values your contributions and empowers you to drive meaningful change in a rapidly evolving market.
Contact Details:
Harnham - Data & Analytics Recruitment Careers Recruitment Team
