Senior Machine Learning EngineerApplying rigorous machine learning to real-world problems that matterWe''re looking for a Senior Machine Learning Engineer to join a multidisciplinary data and AI team delivering high-impact, real-world solutions in a secure and highly regulated environment.This is a senior, hands-on practitioner role, not a people-management position. You''ll operate with a high degree of autonomy, leading complex machine learning work end-to-end through technical depth, sound judgement, and delivery credibility.The organisation is outcome-led rather than technology-led. Where strong market solutions exist, they are used. Machine learning is built in-house only where problems are genuinely complex, niche, or sensitive - requiring experimentation, evaluation, and iteration beyond what can be bought. This means the work is thoughtful, challenging, and purposeful, rather than driven by novelty or trend.What you''ll be doingYou''ll take ownership of complex ML problems, applying scientific thinking and pragmatism in equal measure.You will:Lead end-to-end machine learning delivery, from problem definition through experimentation, evaluation, and iterationApply mathematical, statistical, and scientific reasoning to form hypotheses, quantify uncertainty, and interpret resultsDesign and run structured experiments to assess model behaviour, performance, and user impactWork with real, imperfect operational data, not just curated or static datasetsCollect, assess, and tr