Senior AI Research Engineer (LLMs / AI Systems) | London | £200K–£300K We’re hiring a Senior AI Research Engineer to work on large-scale AI systems deployed in production. The role sits between research and engineering, focusing on improving the models and systems behind AI agents. Work includes instruction following, long-context reasoning, retrieval, and multi-step task execution. What You’ll Do Improve core capabilities such as instruction following, retrieval, contextual memory, and long-horizon tasks Build and iterate on model training, evaluation, and orchestration pipelines Develop end-to-end systems that run reliably at scale Take research ideas from prototype to deployed systems Work closely with engineers to ship models into production What We’re Looking For 5 years in AI/ML engineering or applied research Experience training, fine-tuning, or deploying LLMs in production Strong Python and familiarity with modern ML tooling (PyTorch, data pipelines, evaluation frameworks) Track record of turning research work into production systems Compensation & Benefits £200K - £300K base Health coverage Flexible vacation Daily meals and office perks Apply: dana@durlstonpartners.com