Principal UI Engineer, Platform; Cortex

Our Mission At Palo Alto Networks®, we’re united by a shared mission—to protect our digital way of life. We thrive at the intersection of innovation and impact, solving real-world problems with cutting-edge technology and bold thinking. Here, everyone has a voice, and every idea counts. If you’re ready to do the most meaningful work of your career alongside people who are just as passionate as you are, you’re in the right place.

Who We Are In order to be the cybersecurity partner of choice, we must trailblaze the path and shape the future of our industry. This is something our employees work at each day and is defined by our values:
Disruption, Collaboration, Execution, Integrity, and Inclusion. We weave AI into the fabric of everything we do and use it to augment the impact every individual can have. If you are passionate about solving real-world problems and ideating beside the best and the brightest, we invite you to join us! We believe collaboration thrives in person. That’s why most of our teams work from the office full time, with flexibility when it’s needed.

This model supports real-time problem-solving, stronger relationships, and the kind of precision that drives great outcomes.

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.

Experience:

• 10+ years of software engineering experience, with 6+ years focused on building complex, web-scale frontend applications.

Core Technologies:

• JavaScript (ESNext), Type Script, 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),…