Senior/Staff ML Research Engineer | London

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Job Description

We're hiring a Senior/Staff ML Research Engineer in London for one of the most exciting conversational AI companies in the world.


Backed by $231M from a16z, Accel, and Bain Capital Ventures, and trusted by some of the world's most recognisable enterprise brands — this team is redefining what AI agents can do across chat, email, and voice at massive scale.


We're hiring a Senior/Staff ML Research Engineer in London for one of the most exciting conversational AI companies in the world.

Backed by $231M from a16z, Accel, and Bain Capital Ventures, and trusted by some of the world's most recognisable enterprise brands — this team is redefining what AI agents can do across chat, email, and voice at massive scale.


The Role

You'll sit on the core Research team, owning work end-to-end from ambiguous idea through to production — at a scale that impacts millions of users. This isn't prompt engineering. This is frontier ML research shipping to the real world.

What you'll be doing:

  • Building models for enterprise customer support tasks that outperform closed-source frontier models
  • Fine-tuning and deploying open-source LLMs to drive order-of-magnitude latency reductions across channels
  • Designing state-of-the-art methods for instruction tuning and information retrieval
  • Breaking down complex research problems into clear, iterative roadmaps
  • Writing clean, bug-free ML code that powers production systems at scale


✅ What We're Looking For

  • 7+ years in AI/ML engineering or research (5+ for exceptional talent)
  • Proven track record shipping ML projects from concept to production
  • Deep experience fine-tuning and deploying LLMs in production environments
  • Experience with multimodal models
  • Strong engineering fundamentals — you write production-quality ML code


Compensation & Benefits

  • £200,000 – £300,000 base salary
  • Competitive equity
  • Medical, dental & vision
  • Unlimited PTO
  • Daily lunches, dinners & snacks in-office


Location & Logistics

  • London — 5 days in-office
  • Full-time, permanent


  • ⚠️ Visa sponsorship is not available — candidates must have the right to work in the UK


#MachineLearning #MLResearch #LLM #ConversationalAI #LondonTech #AIJobs #Hiring

Yh #LLM #ConversationalAI #LondonTech #AIJobs #Hiring

Apply
Location:
City Of London
Job Type:
FullTime
Category:
Engineering

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