[Remote] Staff Software Engineer (Core UI)

Note: The job is a remote job and is open to candidates in USA. SimSpace is an AI Proving Ground where organizations can confidently train, test, and outmaneuver adversaries in any environment. They are seeking a Staff Software Engineer for their Core UI team, responsible for setting frontend architecture and standards, leading complex UI initiatives, and mentoring other engineers. This role emphasizes hands-on technical leadership and collaboration with UX Designers and Product Managers.ResponsibilitiesServe as the senior-most technical voice for SimSpace's core frontend, owning architecture decisions and the technical roadmap for shared UI systemsLead major frontend initiatives end to end—from requirements gathering and architecture design through delivery—setting clear goals, priorities, and technical directionSteward architectural decisions and manage technical and UX debt deliberately, balancing long-term health with delivery needsDefine and enforce frontend technical standards for code health, performance, testing, and documentationMentor Design Engineers and frontend engineers, modeling strong craft, collaboration, and pragmatismDesign, build, extend, and maintain SimSpace's design system (e.g., Monorail) and higher-order component libraries, emphasizing consistency, accessibility, responsiveness, and performanceContribute 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 healthAct as a technical partner to UX Designers—providing feasibility feedback, implementation guidance, and UI engineering insight early in the design processDefine, improve, and automate the workflows that turn design intent into production code efficiently and predictablyDevelop prototyping workflows that let UX research gather customer feedback and iterate on designs quicklyLead accessibility (a11y) best practices at the component and system levelDefine standards, documentation, and WCAG-aligned guidance that help engineers build accessible interfacesIdentify gaps through testing and drive remediation across shared systemsIdentify and address UX and UI quality issues—visual inconsistencies, interaction gaps, and usability bugs—across the productConduct code reviews and provide constructive feedback to ensure quality, performance, and adherence to standardsCreate documentation, examples, and internal talks that help frontend engineers use shared UI systems effectively, and support initiatives like theming, white-labeling, and design token strategyLead UI-focused initiatives end to end, balancing ideal UX outcomes with delivery realitiesSkills8+ years of professional experience in frontend, UX, or design-adjacent engineering, including a track record of leading technical projects end to endDeep expertise in TypeScript and React—modern component patterns, state management, and performance—sufficient to set architectural direction for shared systemsExperience building and maintaining design systems or shared UI libraries used by multiple teamsSolid understanding of accessibility (a11y) standards and how to operationalize them in real-world interfacesExperience writing well-tested, well-documented UI code intended for reuse and scaleProven ability to collaborate closely with designers, product managers, and engineers across teamsExperience with Storybook, design tokens, and Figma-to-code workflowsFamiliarity with frontend testing strategies (unit, visual, and accessibility testing)Experience with responsive design systems and theming or white-labeling approachesExperience with rapid UI prototyping and iterating against customer and UX research feedbackComfort working across the stack when needed (API integration, backend collaboration)Interest in emerging tools and workflows, including AI-assisted UI development and prototypingExperience bootstrapping services or libraries with CI/CD tooling (e.g., GitHub Actions, ArgoCD)BenefitsOffers EquityOffers BonusComprehensive 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.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.Company OverviewSimSpace combines high-fidelity, military-grade cyber ranges and training content with unique user and adversary emulation techniques. It was founded in 2015, and is headquartered in Boston, Massachusetts, USA, with a workforce of 201-500 employees. Its website is https://www.simspace.com/.