Staff Software Engineer, 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 WORLDWelcome to the dynamic world of NinjaTrader! 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, NinjaTrader 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, NinjaTrader 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 NinjaTrader? 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:We are seeking a highly skilled and experienced Design Systems Engineer. You will be the foundational engineer responsible for designing, building, and scaling NinjaTrader’s new enterprise-grade design system, which will serve as a core frontend platform across multiple product teams in a regulated, high-availability trading environment. This role is expected to help shape the long-term evolution of the design systems function, including mentoring future contributors and team members, and carries clear technical ownership and decision-making authority for the design system as a shared frontend platform across the organization.In this role you will:Own the development, maintenance, and evolution of NinjaTrader’s design system, including UI components, patterns, tokens, and documentation; this includes defining system standards, architectural direction, and long-term technical strategyAct as the technical authority for how designs are translated into production UI, partnering with Design while maintaining final responsibility for engineering quality, performance, and maintainabilityMake and defend tradeoffs between consistency, flexibility, velocity, and performance on behalf of the broader engineering organizationBuild and maintain a component library using modern frontend technologies, ensuring components are accessible, performant, and easy to consume across teamsEstablish and enforce best practices for consistency, accessibility (WCAG), responsiveness, and cross-browser compatibilityCollaborate with other frontend engineers to support adoption of the design system, guide implementation, and continuously improve developer experiencesInfluence adoption through technical leadership rather than direct reporting authorityDesign scalable CSS and styling architectures (e.g., tokens, theming, variables) that support multiple products, themes, and future growthCreate and maintain comprehensive documentation, examples, and usage guidelines for designers and engineersWork closely with Product, Design, and Engineering leadership to align the design system roadmap with business and product needsWhat you'll need:8+ years of professional experience in frontend engineering, design engineering, or design systems developmentDemonstrated experience building or leading a design system from early or intermediate stages, including architectural decisions, adoption challenges, and long-term maintenanceStrong expertise in modern CSS and styling approaches (CSS-in-JS, CSS Modules, Tailwind, or similar), including theming and design tokensProven experience partnering deeply with designers and translating design tools (e.g., Figma) into high-fidelity, production-ready componentsStrong knowledge of web accessibility standards (WCAG 2.2 AA) and experience building inclusive, accessible interfacesExperience supporting shared systems used by multiple teams or products, balancing consistency with flexibilityAbility to balance design fidelity, performance, and accessibility in production systemsFamiliarity with modern frontend tooling a