Principal UI Engineer

Who you are

• Experience: 10+ years of software engineering experience, with 6+ years focused on building complex, web-scale frontend applications
• Core Technologies: Mastery of JavaScript (ESNext), TypeScript, React, Angular, HTML5, Tailwind/CSS3/Sass
• State & Architecture: Deep understanding of state management (RxJS, Redux Toolkit, Zustand, React Query) and modern frontend application patterns (Micro-Frontends, Webpack Module Federation)
• Data Visualization: Hands-on experience building complex data visualizations and rich UI dashboards
• Tooling & CI/CD: Experience with modern build tools (Vite, Webpack, Babel), CI/CD workflows, and testing frameworks (Jest, React Testing Library, Cypress/Playwright)
• Education: Bachelor’s or Master’s degree in Computer Science, Computer Engineering, or equivalent practical experience
• Experience building shared platform capabilities or core UI frameworks in cybersecurity, SIEM, or SOC operations domains
• Experience maintaining enterprise design systems and UI component libraries (e.g., Storybook)
• Understanding of WebSockets, Server-Sent Events (SSE), and real-time frontend streaming architecture
• Exposure to AI/LLM integrations within web interfaces (e.g., streaming chat responses, autonomous agent workflows)

What the job involves

• Palo Alto Networks is the global cybersecurity leader
• The Cortex platform delivers AI-driven enterprise security operations—including Cortex XDR, XSOAR, XSIAM, and Xpanse—to protect thousands of organizations against complex cyber threats
• As a Principal UI Engineer on the Cortex Platform team, you will play a key leadership role in advancing our frontend ecosystem
• Working alongside architecture leadership, you will help execute the platform's technical vision, driving scalable UI architecture, design system integrations, robust data visualization, and performance optimization
• Collaborating closely with UX designers, backend engineers, and product managers, you will shape how security analysts monitor, analyze, and automate threat responses
• Architecture & Scalability: Partner with architecture leadership to execute the frontend technical strategy for Cortex Platform products, building modular, performant, and resilient micro-frontend structures
• Data & Workflow Visualization: Lead the development of intuitive data visualizations and complex UI components that present high-volume, multi-source data clearly to end users
• Design System & Component Library: Partner with UX teams to evolve and maintain enterprise-grade design systems, ensuring UI component consistency and accessibility (WCAG) across products
• Performance Optimization: Optimize bundle sizes, rendering paths, state management, and asset loading for ultra-fast response times under heavy client-side data loads
• Cross-Functional Leadership: Partner with backend engineers, AI/ML teams, and product leaders to translate complex security workflows into intuitive platform interfaces
• Mentorship & Quality Standards: Establish frontend best practices, automated UI testing pipelines (E2E/Unit), and code review standards while mentoring mid-level and senior UI engineers

Benefits

• Healthcare: We value your health and provide options so you can choose what best supports your lifestyle and personal health goals. Various nationwide plans — including Blue Shield of California, Kaiser Permanente, Delta Dental, VSP, and more — are available to you and your family. Our providers offer the flexibility you want and the coverage you need
• Wellness: With a large on-site gym and daily, instructor-led exercise classes at HQ in Santa Clara, Palo Alto Networks actively supports employee fitness. Our juice bar, Gym & Juice, features fresh juice blends, a quick and nutritious option pre- or post-workout. And our ongoing wellness speaker series highlights the latest trends in health and wellness
• Development: Professional development is serious business at Palo Alto Networks, where the Talent Development team offers 25+ courses to help employees boost their careers and develop leadership capability
• Financial: Most roles are eligible for equity grants, and we now offer new hires a quarterly vesting schedule right away. We want you to be fairly compensated and rewarded as soon as you make an impact – on our team, that happens immediately! And because we consider every employee a stakeholder in our long-term success, we offer an Employee Stock Purchase Plan (ESPP) with a 24-month lookback. From life insurance to health savings accounts, we provide ways to help you protect and grow your wealth. Palo Alto Networks offers both traditional and Roth 401(k) options, along with a company match of 50% to a max annual amount of $1,000
• Time Off: In addition to paid corporate holidays, Flexible Time Off programs empower our employees to balance their work schedules with personal time off. We offer 12 weeks of full pay for medical leave and 6 weeks of full pay for parental leave. As a company with strong ties to the military and veterans, we also offer 26 weeks of full pay for military leave
• Perks: Our corporate discount program provides employees with significant discounts on merchandise, travel and entertainment. We offer many on-site perks at headquarters, including cafeterias, fuel service, dry cleaning service, EV charging stations, and a company store. We also provide complimentary drinks, fresh fruit, and snacks in break rooms across our campus to help everyone power through the day.

Life at Palo Alto Network