Staff Software Engineer (Core UI)

SimSpace Corporation

2d•$185,000 - $260,000•Hybrid

About The Position

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.

Requirements

8+ years of professional experience in frontend, UX, or design-adjacent engineering, including a track record of leading technical projects end to end.
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.
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.

Nice To Haves

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).

Responsibilities

Set Technical Direction & Architecture: 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.
Bridge UX and Engineering: 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.
Champion Accessibility: 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.
Raise Quality & Enable Teams: 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.

Benefits

Base salary range: $185,000 – $260,000, reflecting our confidence in your expertise and impact, with the opportunity for annual bonuses tied to company performance and individual contributions.
Comprehensive medical, dental, and vision benefits, plus savings plans—coverage starts on day one!
Access to company-paid counseling, coaching, and resources for you and your family through Spring Health.
Plan for your future with a 401(k)-retirement savings plan featuring a company match.
Paid leave plans to support you and your loved ones during life’s most important moments.
Equity stock options at hire, with annual performance-based grants—become an invested stakeholder in our shared success.
Earn $1,500–$3,500 for every qualified hire through our employee referral program.
Peloton Interactive Wellness Program: Full- and partial- subsidized membership plans and equipment discounts to help you reach your personalized wellness goals.
Access a LinkedIn Learning membership to prioritize your personal and professional development.
Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community.
Legal plan coverage, pet insurance, wellness reimbursements, and more to simplify life’s details.