Staff Software Engineer, Core UI

🕒 June 15

🇺🇸 United States – Remote

💵 $185k - $260k / year

⏰ Full Time

🔴 Lead

🧑‍💻 Full-stack Engineer

🦅 H1B Visa Sponsor

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SimSpace

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2015

💼 Consulting

🎖️ Defense

🔒 Cybersecurity

🔥 Funding within the last year

💰 $39M Venture Round - SimSpace on 2025-10

Consulting • Defense • Cybersecurity

SimSpace is a cybersecurity company that provides a realistic, intelligent cyber range platform for training, testing, and validating security teams, tools, and AI agents. Its platform enables live-fire exercises, threat emulation (full kill-chain and atomic), validation of controls and agentic workflows, and disaster recovery and compliance testing; it is used by enterprises and government customers to build cyber readiness and resilience. Founded by experts from U. S. Cyber Command and MIT Lincoln Laboratory, SimSpace focuses on upskilling individuals, strengthening teams, and evaluating AI-driven defenses in realistic, production-like simulations.

📋 Description

• 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. • 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. • Lead accessibility (a11y) best practices at the component and system level. • 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.

🎯 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.

🏖️ Benefits

• Base salary range: $185,000 – $260,000 • 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. • 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. • Earn $1,500–$3,500 for every qualified hire through our employee referral 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.