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Senior Research Engineer
Job Summary
Advertiser
Salary / Rate
Posted
Durlston Partners
Neg
19th March 2026
Location
Start Date
London
Type
Job Sector
{}
IT
Senior Research Engineer – Production AI Systems London | In-office | Up to £300k base significant equity About Our Client Our client is a very well-funded AI startup solving some of the hardest problems in production large language models. They're building systems that reliably handle complex, multi-step reasoning tasks at massive scale. Their team combines talent from top-tier quantitative trading firms, leading AI research labs, and Big Tech. Backed by tier-one venture capital, they ship fast, maintain exceptionally high technical standards, and operate as an in-office team in London. The Role They're hiring a Senior Research Engineer to build and deploy core AI models from conception through production. You'll work on genuinely hard, unsolved problems: building LLMs that reason reliably across long contexts, maintain coherent state over extended interactions, and make sound decisions under uncertainty – all whilst serving millions of requests with strict latency requirements. Hard…
