> Markdown version of [/jobs/ext/573760-staff-software-engineer-core-ui](https://www.wearedevelopers.com/jobs/ext/573760-staff-software-engineer-core-ui). 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). --- # Staff Software Engineer (Core UI) - **Company:** SimSpace Corporation - **Location:** United States (Remote available) - **Experience:** Expert - **Salary:** $185,000.0 - $260,000.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Code Review, Continuous Integration, Github, Design of User Interfaces, Responsive Web Design, Strategies of Testing, TypeScript, Web Content Accessibility Guidelines, ReactJS, Backend, Production Code, Figma, Front End Software Development - **Published:** June 17, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=0286b2b320228878 ## About the Role Do you have experience in WCAG?, * 8+ years of professional experience in frontend, UX, or design-adjacent engineering, including a track record of leading technical projects end to end. (Adjust to your leveling.) * Deep expertise in TypeScript and React-modern component patterns, state management, and performance-sufficient to set architectural direction for shared systems. * Experience building and maintaining design systems or shared UI libraries used by multiple teams. * Solid understanding of accessibility (a11y) standards and how to operationalize them in real-world interfaces. * Experience writing well-tested, well-documented UI code intended for reuse and scale. * Proven ability to collaborate closely with designers, product managers, and engineers across teams., * Experience with Storybook, design tokens, and Figma-to-code workflows. * Familiarity with frontend testing strategies (unit, visual, and accessibility testing). * Experience with responsive design systems and theming or white-labeling approaches. * Experience with rapid UI prototyping and iterating against customer and UX research feedback. * Comfort working across the stack when needed (API integration, backend collaboration). * Interest in emerging tools and workflows, including AI-assisted UI development and prototyping. * Experience bootstrapping services or libraries with CI/CD tooling (e.g., GitHub Actions, ArgoCD). Who You Are * You set a high bar for UX quality, consistency, and craft-and you know how to operationalize it through systems and standards, not heroics. * You're the person others look to for hard technical calls, and you make them with judgment and pragmatism. * You enjoy working across disciplines and translating design intent into durable, reusable systems. * You're comfortable leading initiatives end to end without formal authority, influencing through craft and collaboration. * You're conscious of scalability and reusability, but realistic when it comes to trade-offs. ## Description SimSpace is investing in the craft, consistency, and quality of every interface our customers touch, as well as in the systems that make great UI possible at scale. Our Core UI team owns the foundation the rest of the product is built on: our design system, shared component libraries, frontend architecture, and the partnership between engineering and UX Design. As a Staff Software Engineer on Core UI, you'll be the senior-most technical voice on the team-setting frontend architecture and standards, leading complex UI initiatives end to end, and contributing directly to the systems every product team depends on. You'll partner deeply with UX Designers, Product Managers, and engineers across the organization, and your technical leadership and mentorship will be key to helping the team raise its bar. This is a hands-on technical leadership role, not a people-management one. You set direction through architecture, code, and influence-staying close enough to the work to make the hard calls, unblock difficult problems, and hold a high bar for craft, accessibility, and performance. We're looking for an experienced engineer who wants real ownership of a domain and treats the frontend platform as a product., * Serve as the senior-most technical voice for SimSpace's core frontend, owning architecture decisions and the technical roadmap for shared UI systems. * Lead major frontend initiatives end to end-from requirements gathering and architecture design through delivery-setting clear goals, priorities, and technical direction. * Steward architectural decisions and manage technical and UX debt deliberately, balancing long-term health with delivery needs. * Define and enforce frontend technical standards for code health, performance, testing, and documentation. * Mentor Design Engineers and frontend engineers, modeling strong craft, collaboration, and pragmatism. Build & Evolve Core UI Systems * Design, build, extend, and maintain SimSpace's design system (e.g., Monorail) and higher-order component libraries, emphasizing consistency, accessibility, responsiveness, and performance. * Contribute directly and deeply to the code, ensuring shared systems stay aligned between design (Figma) and implementation (code, Storybook). * Review and curate contributions from other engineers to shared UI libraries, maintaining high standards for UX quality and code health., * Act as a technical partner to UX Designers-providing feasibility feedback, implementation guidance, and UI engineering insight early in the design process. * Define, improve, and automate the workflows that turn design intent into production code efficiently and predictably. * Develop prototyping workflows that let UX research gather customer feedback and iterate on designs quickly., * Lead accessibility (a11y) best practices at the component and system level. * Define standards, documentation, and WCAG-aligned guidance that help engineers build accessible interfaces. * Identify gaps through testing and drive remediation across shared systems., * Identify and address UX and UI quality issues-visual inconsistencies, interaction gaps, and usability bugs-across the product. * Conduct code reviews and provide constructive feedback to ensure quality, performance, and adherence to standards. * Create documentation, examples, and internal talks that help frontend engineers use shared UI systems effectively, and support initiatives like theming, white-labeling, and design token strategy. * Lead UI-focused initiatives end to end, balancing ideal UX outcomes with delivery realities., * Peloton Interactive Wellness Program: Full- and partial- subsidized membership plans and equipment discounts to help you reach your personalized wellness goals. * Continuous Learning: Access a LinkedIn Learning membership to prioritize your personal and professional development. * Social Connections: Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community. * Extra Perks: Legal plan coverage, pet insurance, wellness reimbursements, and more to simplify life's details. * Semi-flexible hours, with the expectation that you overlap the main part of the day to meet deadlines, collaborate with colleagues and attend key meetings. SimSpace is an Equal Opportunity Employer: In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire. ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Boost Productivity with AI: Figma & Playwright MCP Workflows - Aris Markogiannakis](https://www.wearedevelopers.com/videos/1768-boost-productivity-with-ai-figma-playwright-mcp-workflows-aris-markogiannakis) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Bringing AI Model Testing and Prompt Management to Your Codebase with GitHub Models](https://www.wearedevelopers.com/videos/1536-bringing-ai-model-testing-and-prompt-management-to-your-codebase-with-github-models) - [WeAreDevelopers LIVE – AI, Freelancing, Keeping Up with Tech and More](https://www.wearedevelopers.com/videos/1786-wearedevelopers-live-ai-freelancing-keeping-up-with-tech-and-more) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front) - [Dev Digest 129 - Now that's what I call private data!](https://www.wearedevelopers.com/magazine/468-dev-digest-129-now-that-s-what-i-call-private-data) - [Dev Digest 131 - AI'm not sure about OSS](https://www.wearedevelopers.com/magazine/472-dev-digest-131-ai-m-not-sure-about-oss)