Software Engineer, Design System

Overview

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JOIN US ON OUR MISSION TO BECOME THE #1 RETAIL TRADING PLATFORM IN THE WORLD

Welcome to the dynamic world of Ninja Trader! As an industry-leading trading platform and futures broker, we empower traders to take control of their financial destiny. We provide cutting-edge products and services that enhance the trading journey. Ninja Trader equips traders with award-winning software and brokerage services to navigate the world7s leading financial markets with confidence. Since 2003, Ninja Trader has supported traders and grown to over 2 million users, becoming the number one rated futures brokerage worldwide.

We are continually evolving and modernizing the futures industry, with access to dynamic tools, real-time support, and a community of like-minded traders.

Join us as we redefine what7s possible in trading, advocate for our customers, and continue our journey toward becoming the world7s top retail-focused trading platform.

We are seeking a highly skilled and experienced Design Systems Engineer. You will be the foundational engineer responsible for designing, building, and scaling Ninja Trader’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.

• Own the development, maintenance, and evolution of Ninja Trader’s design system, including UI components, patterns, tokens, and documentation; this includes defining system standards, architectural direction, and long-term technical strategy
• Act as the technical authority for how designs are translated into production UI, partnering with Design while maintaining final responsibility for engineering quality, performance, and maintainability
• Make and defend tradeoffs between consistency, flexibility, velocity, and performance on behalf of the broader engineering organization
• Build and maintain a component library using modern frontend technologies, ensuring components are accessible, performant, and easy to consume across teams
• Establish and enforce best practices for consistency, accessibility (WCAG), responsiveness, and cross-browser compatibility
• Collaborate with other frontend engineers to support adoption of the design system, guide implementation, and continuously improve developer experiences
• Influence adoption through technical leadership rather than direct reporting authority
• Design scalable CSS and styling architectures (e.g., tokens, theming, variables) that support multiple products, themes, and future growth
• Create and maintain comprehensive documentation, examples, and usage guidelines for designers and engineers
• Work closely with Product, Design, and Engineering leadership to align the design system roadmap with business and product needs

• 8+ years of professional experience in frontend engineering, design engineering, or design systems development
• Demonstrated experience building or leading a design system from early or intermediate stages, including architectural decisions, adoption challenges, and long-term maintenance
• Strong expertise in modern CSS and styling approaches (CSS-in-JS, CSS Modules, Tailwind, or similar), including theming and design tokens
• Proven experience partnering deeply with designers and translating design tools (e.g., Figma) into high-fidelity, production-ready components
• Strong knowledge of web accessibility standards (WCAG 2.2 AA) and experience building inclusive, accessible interfaces
• Experience supporting shared systems used by multiple teams or products, balancing consistency with flexibility
• Ability to balance…