Sr. Designer, Design System

Disclaimer: Please be advised that the most accurate and up-to-date information about our open roles—including job descriptions, compensation, and benefits—can only be guaranteed on our official job board. For the latest listings and details, please visit: https://job-boards.greenhouse.io/ninjatrader. JOIN US ON OUR MISSION TO BECOME THE #1 RETAIL TRADING PLATFORM IN THE WORLD Welcome to the dynamic world of Keystone AI! As an industry-leading trading platform and futures broker, we're empowering traders to take control of their financial destiny. How do we do it? We provide cutting-edge products and services that enhance the trading journey. Whether a seasoned pro or just starting out, Keystone AI equips traders with award-winning software and brokerage services to navigate the world's leading financial markets with confidence. Our growth story is nothing short of exhilarating. Since 2003, Keystone AI has been dedicated to understanding and supporting traders on their journey toward trading triumph. Through those efforts, our user base has grown to over 2 million users and we have become the number one rated futures brokerage worldwide. But we're not stopping there. We're constantly evolving, pushing boundaries, and modernizing the futures industry. Our commitment to innovation means users will always have access to dynamic tools, real-time support, and a community of like-minded traders. So, why work at Keystone AI? Here, you're not just part of a team; you're part of a movement. We empower employees to reach new heights in their careers by providing a dynamic culture focused on social connection, professional development, and employee recognition initiatives. Sounds too good to be true? Take it from our employees. Join us as we redefine what's possible in trading, advocate for our customers, and continue our journey toward becoming the world's top retail-focused trading platform in the world. What you’ll do: Keystone AI’s growing Design organization is seeking an experienced, highly skilled, and collaborative Senior Design System Designer. Working closely with our Design Systems Lead, you’ll help evolve and scale our design system while enabling designers and engineers to build high-quality, consistent experiences across our trading platform. You’ll combine exceptional visual design craft with systems thinking, partnering across Product, Engineering, and Design to improve efficiency, accessibility, and product quality. In this role you will: Partner with the Design Systems Lead to evolve and scale Keystone AI’s design system across web, desktop, and mobile experiences Create, document, and maintain high-quality reusable UI components, patterns, templates, and interaction guidelines Maintain and extend design token architecture that supports scalable implementation across platforms Collaborate directly with Engineering to ensure design system components are accurately implemented and maintained in Storybook and production Identify opportunities to improve consistency, usability, accessibility, and efficiency throughout the product ecosystem Build and optimize Figma libraries, variables, plugins, automation, and AI-assisted workflows to streamline design operations Support product designers by providing guidance, documentation, onboarding, and best practices for using the design system effectively Contribute to governance processes that ensure the design system evolves intentionally while supporting product velocity Help define and track adoption metrics, component health, and system usage to continuously improve the effectiveness of the design system What you’ll need: 7+ years of experience in UX, UI, or Product Design, including at least 2 years focused on design systems Demonstrated experience designing, documenting, and maintaining scalable component libraries and design systems for complex digital products Expert proficiency in Figma, including components, variables, auto layout, libraries, and modern workflow automation Strong understanding of design tokens, component architecture, and design-to-development workflows Working knowledge of Storybook and modern frontend technologies (HTML, CSS, JavaScript frameworks) with the ability to collaborate effectively with engineers Familiarity with accessibility standards (WCAG) and inclusive design practices Strong visual design, interaction design, and systems thinking skills with a portfolio demonstrating scalable design solutions Experience balancing consistency with product flexibility across multiple teams and products Excellent communication, collaboration, and documentation skills with the ability to influence without direct authority Passion for craftsmanship, continuous improvement, and elevating design quality across an organization Bonus points for: Experience building or supporting enterprise-scale design systems Experience developing Figma plugins, automation, or AI-assisted design workflows Experience measuring design system adoption through ana