Principal Product Designer (UI Design andamp; Digital Product Design)£650 per day | Inside IR356-month contractLondon - Hybrid (2 days per week onsite)OverviewWe''re looking for an exceptional Principal Product Designer to play a key role in building a large-scale digital platform from the ground up.This is a rare greenfield opportunity to define the visual identity, interaction patterns and design standards for a suite of modern digital products. Working closely with Product, Engineering and senior stakeholders, you''ll create outstanding user experiences while establishing a scalable design system that will underpin the platform for years to come.This role is ideal for a highly experienced designer with exceptional UI and interaction design skills, a strong portfolio of shipped products, and a passion for creating elegant, intuitive experiences at scale.Role andamp; ResponsibilitiesOwn and evolve the visual design language across multiple digital products.Create high-fidelity UI designs, interactive prototypes and detailed design specifications.Lead the development and governance of a scalable design system, including reusable components, design tokens and documentation.Define interaction patterns that deliver intuitive, accessible and consistent user experiences.Work closely with engineers to ensure pixel-perfect implementation and design quality.Translate complex business and technical requirements into simple, engaging interfaces.Champion accessibility, usability and res