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Senior LLM Research Engineer, Applied AI

London, UK·AI/ML

PythonLLMsRAGTransformersHugging Face

About the role

We are building the next generation of LLM-powered features for screening, summarization, and candidate insights. As a Senior LLM Research Engineer you will bridge research and production for our applied AI team.

What you'll do

  • Prototype and evaluate LLM systems for retrieval-augmented generation
  • Fine-tune and optimize models for accuracy, latency, and cost
  • Build robust evaluation harnesses and guardrails
  • Collaborate with product to ship AI features safely to users

Requirements

  • 5+ years in ML engineering with hands-on LLM experience
  • Strong Python and deep familiarity with transformer architectures
  • Experience building RAG pipelines and evaluation frameworks

Nice to have

  • Published research or open-source contributions in NLP
  • Experience with model serving and inference optimization

Benefits

  • Competitive salary and equity
  • Private medical insurance and pension contributions
  • Annual research and conference budget