> Markdown version of [/jobs/ext/4719573-principal-software-development-engineer-design-systems-web](https://www.wearedevelopers.com/jobs/ext/4719573-principal-software-development-engineer-design-systems-web). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Development Engineer, Design Systems (Web) - **Company:** Zhl Zillow Home Loans, Llc - **Location:** Los Angeles County, CA, United States (Remote available) - **Experience:** Expert - **Salary:** $195,600 - $312,400 - **Contract:** Permanent contract - **Skills:** Web Accessibility, Application Programming Interfaces (APIs), Artificial Intelligence, Apple IOS, Cascading Style Sheets (CSS), Computer Engineering, Next.js, Screen Reader, Software Engineering, TypeScript, Web Usability, Tailwind, ReactJS, Deep Web, Agentic-AI, Information Technology, Front End Software Development - **Published:** November 14, 2026 - **Apply:** https://startup.jobs/principal-software-development-engineer-design-systems-web-zhl-zillow-home-loans-llc-10766601 ## About the Role * You have 8+ years of front-end engineering experience, including several years in platform engineering: architecting and championing the paved roads that multiply velocity for other engineering teams, from design systems to self-service tools and foundational infrastructure. * Bachelor's degree in Computer Science or Computer Engineering, or equivalent work experience. * You have expert-level React, TypeScript, and CSS architecture skills, including designing composable component APIs and working with build-time styling systems such as Panda CSS, vanilla-extract, StyleX, or Tailwind. * You bring strong architectural judgment across the broader web stack, from build tooling and server rendering to the platform integrations that a wide variety of consuming applications depend on. * You have led multi-phase migrations and major upgrades of a shared library across many consuming applications, backed by strong testing and release practices and careful judgment on compatibility. * You have deep web performance expertise, including Core Web Vitals (especially INP), and can trace issues to their root cause across complex, multi-team applications. * You have deep accessibility expertise at the component-contract level and build components that are accessible by default, from ARIA relationships and focus management to keyboard behavior and screen reader testing. * You have strong AI fluency, use agentic coding tools with sound judgment, and set code standards that hold up whether code is written by people or AI agents. * You are a recognized technical leader beyond your team: you spot opportunities before anyone asks, mentor senior engineers, and influence engineering, design, and product leaders through evidence, clear writing, and compelling technical narratives. Nice-to-haves * Experience building a headless component architecture (from scratch or on Radix Primitives, React Aria, Base UI, or Ark UI) or migrating a styling engine such as Panda CSS. * Experience with micro-frontend architectures, server-side rendering and hydration, or Next.js applications. * Experience evolving a design system across multiple brands with shared design tokens and theming. * Experience extending a design system to support AI-generated or server-driven UI. ## Description Zillow Experience Design (ZxD) shapes how people discover, buy, sell, and rent homes. Within ZxD, Design Foundations creates and scales the systems, standards, and tools that help product teams build high-quality, consistent, and accessible experiences across Zillow. Design Foundations brings together design systems, digital accessibility, brand and visual language, content standards, and the AI-enabled tools increasingly used by Product, Design, and Engineering teams to design and build products. Zillow's design systems, known internally as Constellation, span Web, iOS, Android, and Email. They give teams the shared components, patterns, and guidance they need to build with greater consistency, accessibility, and efficiency., We're hiring a Principal Software Development Engineer to be the technical owner of Constellation Web. You'll set the technical direction for how the system evolves and keep it a healthy, reliable foundation for more than 300 codebases across Zillow, Trulia, StreetEasy, and HotPads, ultimately shaping how millions of people experience these products. Zillow is accelerating AI-native product development. Your work will shape how Constellation Web evolves to support AI-assisted development and AI-generated UI, while setting and upholding a high bar for quality, performance, and accessibility across every team that builds with it. You'll partner closely with design systems designers and engineers for web, engineering leads for our iOS, Android, and Email design systems, Zillow's front-end platform team, and senior engineering leaders across Zillow. In this role, you will Set technical direction for Constellation Web * Define and drive the technical vision for Constellation Web, from component architecture and styling to framework upgrades and future major releases. * Make the consequential architecture decisions that shape how teams across Zillow build for the web, using evidence to bring clarity to complex trade-offs. * Partner proactively with Zillow's front-end platform team to shape how both platforms evolve together particularly as AI changes front-end development. Drive adoption and alignment across Zillow * Align senior engineering leaders on foundational technical shifts that require changes across their teams, building buy-in through a clear narrative and shaping investment decisions. * Guide how consuming teams adopt and upgrade Constellation Web across different tech stacks and app architectures. * Build strong partnerships with design systems designers, product managers, engineers, and partner teams to influence initiatives early.