Principal Software Development Engineer, Design Systems – Web
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Job Description
Principal engineer owning Constellation Web, Zillow’s shared design system for real estate products. Driving architecture, performance, accessibility, and AI-native frontend development.
Responsibilities:
- Set the technical direction and vision for Constellation Web
- Define component architecture, styling strategy, framework upgrades, and major releases
- Make architecture decisions for web development across Zillow
- Partner with the front-end platform team as platforms evolve alongside AI-assisted development
- Align senior engineering leaders on foundational technical changes and investment decisions
- Guide consuming teams through adoption and upgrades across varied technology stacks and application architectures
- Partner with design systems designers, product managers, engineers, and other teams
- Own end-to-end performance across complex pages, sub-apps, and micro-frontends
- Drive resolution of performance issues with the appropriate teams
- Own release safety, code quality, and accessibility standards for published packages
- Contribute code where it provides the most leverage
- Mentor senior engineers and grow technical leadership
- Define how Constellation Web is built and used with coding agents
- Shape support for AI-generated and server-driven UI while maintaining quality standards
Requirements:
- 8+ years of front-end engineering experience, including several years in platform engineering
- Bachelor’s degree in Computer Science or Computer Engineering, or equivalent work experience
- Expert-level React, TypeScript, and CSS architecture skills
- Experience with composable component APIs and build-time styling systems such as Panda CSS, vanilla-extract, StyleX, or Tailwind
- Strong architectural judgment across build tooling, server rendering, and platform integrations
- Experience leading multi-phase migrations and major upgrades of shared libraries across consuming applications
- Deep web performance expertise, including Core Web Vitals, especially INP
- Deep accessibility expertise, including ARIA, focus management, keyboard behavior, and screen reader testing
- Strong AI fluency and experience using agentic coding tools
- Recognized technical leadership, mentoring, influence, clear writing, and technical narratives
- Experience with headless component architectures or styling-engine migrations (nice-to-have)
- Experience with micro-frontends, server-side rendering and hydration, or Next.js (nice-to-have)
- Experience evolving multi-brand design systems with shared design tokens and theming (nice-to-have)
- Experience supporting AI-generated or server-driven UI (nice-to-have)
- Must reside in one of the 50 United States, with limited exceptions
Benefits:
- Equity awards
- Remote work from a physical location of choice
- Flexible distributed work through Cloud HQ
- Equal employment opportunity and disability accommodations
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