Principal Designer

Required

• You are adept at product and brand integration, storytelling, and visual design, and you can bridge these domains to accelerate our product language and evolution.
• This role reports to the Senior Director of UX Design and is a core leader of the UX team’s impact.
• What You Will Be Doing
• As Principal Design Lead at The Trade Desk, you will:
• Own & Evolve the Digital Playbook
• Define, maintain, and evolve the Digital Playbook, including design foundations, style guide, component anatomy, and the guidance that connects them, as the source of truth for how our product and brand show up across the platform
• Set the standards and principles that help teams design with consistency, clarity, and craft
• Keep the Playbook a living resource: adopted in daily work, responsive to product change, and measurable in its impact on quality and speed
• Translate ambiguous product and brand needs into clear, usable guidance that teams can apply with confidence
• Partner on Core Platform Evolution
• Work in close partnership with the Director leading Core Platform Evolution to ensure the Playbook and the platform’s direction evolve together
• Guide the evolution of our product design language as the platform grows, helping unify the experience, reduce fragmentation, and close quality gaps