Principal Product Designer (Interaction Design UX & Design Systems)

Principal Product Designer (Interaction Design UX & Design Systems)

• £550 - £650 per day (Outside IR35)
• London (Hybrid) x2 days onsite
• 6 month contract

Overview
We are looking for an exceptional Principal Product Designer to join an exciting organisation building a large-scale digital platform from the ground up. This is a rare opportunity to define the visual and interaction design language of a greenfield product ecosystem. Working closely with senior product, engineering, and leadership teams, you will shape how users experience the platform, establish design standards, and create the foundations of a scalable design system. The ideal candidate combines outstanding visual craft with strong interaction design expertise and thrives in environments where they can influence both product direction and design culture.

Role & Responsibilities

• Own and evolve the visual and interaction design language across a suite of digital products
• Create high-fidelity designs, prototypes, and user experiences that are intuitive, elegant, and accessible
• Build and maintain a scalable design system, including reusable components, patterns, and documentation
• Define standards for design quality, usability, consistency, and accessibility
• Work closely with engineers to ensure designs are implemented accurately and to a high standard
• Collaborate with product and delivery teams to translate complex requirements into engaging user experiences
• Champion user-centred design and contribute to research, testing, and continuous improvement activities

Essential Skills & Experience

• Significant experience as a Product Designer, Interaction Designer, or UX/UI Designer working on complex digital products at an enterprise level
• A portfolio demonstrating exceptional visual design, interaction design, and design systems work
• Experience building or contributing to scalable design systems and component libraries
• Strong proficiency with modern design and prototyping tools
• Excellent understanding of accessibility, usability, and responsive design principles
• Ability to work effectively in fast-paced environments with evolving requirements
• Strong stakeholder management and communication skills

Desirable Skills & Experience

• Experience establishing design standards within growing teams or greenfield programmes
• Knowledge of front-end technologies and how design translates into production
• Experience working within complex, regulated, or highly governed environment
• Familiarity with modern product development practices and cross-functional delivery teams