Artificial Intelligence Engineer

Company: Understanding Recruitment Ltd
Apply for the Artificial Intelligence Engineer
Location: London
Job Description:

AI Engineer

LLMs / Python / PyTorch / Rust | Defence AI | UK

Are you an AI Engineer who wants to work on problems where model performance, reliability and real-world impact genuinely matter?

I’m working with a highly ambitious, VC-backed AI start-upbuilding advanced AI systems for some of the most demanding defence and national security environments.

They’re looking for exceptional AI Engineers to build and deploy production-grade agentic systems, working on problems that go far beyond standard LLM applications.

Why it’s interesting:

  • Build advanced AI agents capable of taking actions in secure, highly controlled environments
  • Work on LLM orchestration, agent architectures and model optimisation
  • Explore multimodal AI, computer vision and real-time sensor data
  • Take ownership of AI systems from research and prototyping through to production
  • Solve challenging problems around reliability, safety, scalability and deployment
  • Join an exceptionally strong engineering team with significant technical autonomy

What we’re looking for:

  • Strong foundations in machine learning, deep learning and applied mathematics
  • Production experience building agentic AI / LLM-based systems
  • Strong programming ability in Python, Rust, C++ or Java
  • Experience with PyTorch, JAX, TensorFlow or agent orchestration frameworks
  • Excellent engineering judgement and the ability to turn research into robust, production-ready AI
  • A genuine interest in solving difficult technical problems with real-world consequences

PhDs, top-tier ML research publications and experience deploying AI in constrained or regulated environments are a bonus.

The technical bar is high. We’re looking for engineers who combine deep ML understanding with the ability to build AI systems that actually work outside a research environment.

UK | Office-first with flexibility

UK right to work and eligibility for SC clearance required.

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Posted: October 22nd, 2026