Lead Data Scientist Location: Midlands based HQ with weekly on-site presence Salary: Up to £75,000 plus competitive bonus and benefitsA large UK consumer eCommerce business is scaling a new internal advertising and monetisation platform and is hiring a Lead Data Scientist to take technical ownership of its core algorithms. This is a technical leadership role with end-to-end ownership of the algorithm roadmap. You will set direction, make architectural decisions, and lead delivery from experimentation through to production in a high-scale environment.What you will doOwn the technical and algorithm roadmap for a large-scale internal ads platform.Design, test and deploy advanced predictive and ranking models such as Two-Tower architectures, RNNs and learning-to-rank approaches.Lead architecture, model selection and production design decisions.Improve feedback loops to increase responsiveness to real-world events and outcomes.Set best practices for production ML, testing, monitoring and deployment.Act as the technical authority for data science across the ads domain.Work closely with engineering, product and commercial teams.Present outcomes and recommendations to senior stakeholders in clear business terms.What you bringStrong background in data science applied to personalisation, recommendations or ranking problems.Proven experience owning and delivering production machine learning systems.Advanced hands-on experience with PyTorch or TensorFlow.Strong Python and SQL skills with