SimSpace

Staff Software Engineer (Core UI)

Remote - U.S · Staff+

Sponsorship not specified$185k-$260kDetected 36 days ago

TypeScriptKotlinReactSpringCode ReviewGitDockerKubernetesCI/CDGitHub ActionsRESTFigmaUX ResearchDesign SystemsAccessibilityAccessibility TestingResearchLeadershipCollaborationMentoring

About the role

SimSpace serves as an AI Proving Ground where organizations can confidently train, test, and outmaneuver adversaries in any environment.
Trusted by allied governments, militaries, enterprises, and research institutions worldwide, SimSpace enables adaptive, AI-ready defenses that stay ahead of evolving threats.
Our governing philosophy of being Human Centered is deeply embedded within our value system.

Responsibilities

Lead major frontend initiatives end to end-from requirements gathering and architecture design through delivery-setting clear goals, priorities, and technical direction.
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).
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.

Requirements

Deep expertise in TypeScript and React-modern component patterns, state management, and performance-sufficient to set architectural direction for shared systems.
Experience writing well-tested, well-documented UI code intended for reuse and scale.
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.
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.)
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.
Proven ability to collaborate closely with designers, product managers, and engineers across teams.

Nice to have

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).
You set a high bar for UX quality, consistency, and craft-and you know how to operationalize it through systems and standards, not heroics.

Skills

in-house training, internal and external learning platforms, cyber conferences, industry events, and dedicated time for skill development.
Our people are empowered to shape their careers - and it shows.
Year over year, SimSpace consistently outperforms industry benchmarks in internal mobility, promotions, and total rewards growth.
Who Thrives Here?

Compensation

$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.
Ownership Opportunities: Equity stock options at hire, with annual performance-based grants-become an invested stakeholder in our shared success.

Benefits

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.
Legal plan coverage, pet insurance, wellness reimbursements, and more to simplify life's details.

Company info

Founded in 2015 by experts from U.S. Cyber Command and MIT Lincoln Laboratory, the platform unifies training, testing, and validation in a realistic, live-fire simulation-helping teams evaluate security investments, optimize performance, and compress cyber readiness cycles from months to days.
Why join SimSpace?
We are an organization that is focused on building our culture and mindfully enhancing our atmosphere every day which is why we have collaborated on an integral value system.
We apply this philosophy to every one of our internal team members, external clients, and their customers.
How Do We Work?
We believe that people are at the center of everything we do.
SimSpace fosters a culture of continuous learning, curiosity, and professional growth.
We're looking for an experienced engineer who wants real ownership of a domain and treats the frontend platform as a product.
We are committed to providing an inclusive and welcoming environment for all members of our staff, clients, volunteers, subcontractors, vendors, and clients.

Equal opportunity

SimSpace is an Equal Opportunity Employer.
Research shows that women and people from underrepresented groups only apply to jobs if they meet all of the qualifications.
However, no one ever meets 100% of the qualifications.
SimSpace encourages you to break that statistic and to apply.

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This listing is sourced directly from SimSpace's careers page and normalized into a canonical job model.