AI Engineer (Agentic RAG & LLM Systems)

Company: Harrington Starr
Apply for the AI Engineer (Agentic RAG & LLM Systems)
Location: Greater London
Job Description:

We are hiring an AI engineer to help build and own our in-house agentic RAG framework, reducing reliance on external AI consultancies and delivering production-grade AI solutions across the business.

This is not a generic data science role. Strong AI fundamentals and real-world engineering experience are essential.

Role Overview

Maintain and extend large, coded AI solutions

Design and build advanced agentic RAG systems for document intelligence

Rapidly develop proofs of concept using AI-assisted development

Evaluate AI vendors and support buy-versus-build decisions

Deliver actionable insights to CIO, research, and operations teams

Requirements

AI-focused Computer Science degree (Bachelor’s or Master’s); formal AI study required

3+ years professional experience, including production ML systems

Strong understanding of AI algorithms, model types, and limitations

Hands-on experience with:

  • LangChain and/or LlamaIndex
  • Advanced Python
  • Agentic RAG architectures
  • Azure AI tools (or ability to learn quickly)

Nice to have

  • Deep learning
  • NLP
  • Computer vision
  • Reinforcement learning
  • Generative AI
  • Backend APIs
  • AI-assisted development tools

Candidate Profile

Resilient, driven, and solution-oriented

Comfortable working at high pace and under pressure

Genuinely passionate about AI and continuous learning

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Posted: March 23rd, 2026