This is an opportunity to take ownership of some of the most commercially important marketing measurement challenges in a growing, data-driven business. You will shape how marketing investment is allocated, influence acquisition strategy, and build the models that drive long-term growth.The CompanyThey are a digital business investing heavily in customer acquisition and marketing analytics. With ambitious growth plans and a commitment to data-led decision making, they are looking to significantly increase marketing spend while ensuring every investment is measurable and effective.Their analytics and data science function plays a role in strategic decision making, partnering closely with marketing leadership to optimise performance and identify scalable growth opportunities. The business embraces modern technologies and AI-enabled ways of working to maximise impact across the organisation.The RoleAs a Senior Data Scientist, you will work closely with the Head of Performance Marketing to evaluate marketing effectiveness, improve acquisition efficiency, and support significant budget growth.Key responsibilities include: Own and develop the Marketing Mix Modelling (MMM) framework to guide marketing investment decisions Analyse channel effectiveness and identify diminishing returns across paid media channels Build and maintain Lifetime Value (LTV) models that support acquisition and budgeting decisions Measure marketing incrementality through experimentation, lift studies, ..... full job details .....