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The Senior Frontend Software Engineer on the Attack & User Emulation team builds the primary control surfaces and dynamic visual interfaces that allow users to configure, simulate, and analyze cyber attacks and realistic user personas. This role exists to bridge complex backend simulation capabilities and real-time telemetry into high-quality, intuitive human-in-the-loop web applications.
Using React and TypeScript, you will lead the execution of frontend features, integrating cutting-edge capabilities like real-time data streaming and AI agent communication streams (such as Model Context Protocol servers). You will partner closely with UX Designers, Product Managers, and backend engineers to maintain a high bar for frontend performance, accessibility, and UI craft.
Customer-facing control surfaces and simulation visualization interfaces for the range platform.
Modern frontend architecture, dynamic topology components, and streaming UI workflows.
Interface accessibility (WCAG), client-side performance, and frontend testing reliability.
Frontend integration boundaries between core UI design systems and backend simulation APIs.
Design, build, and maintain high-performance web applications using React and TypeScript.
Lead end-to-end technical execution for frontend features, including real-time streaming displays (WebSockets, SSE) and AI/MCP integrations.
Improve client-side performance, code reusability, testing coverage, and WCAG accessibility standards.
Solve complex frontend challenges around visualizing large datasets, interactive network topology, and agentic workflows.
Collaborate with UX Designers on feasibility and partner with backend engineers to define API contracts.
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Boston, USA
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Conduct thorough code reviews, champion frontend engineering standards, and mentor team members.
By 30 days: Establish fluency in the application codebase, contribute to core React/TypeScript workflows, and deliver streaming interface features.
By 60 days: Drive end-to-end technical delivery for a major simulation UI epic in partnership with Product, UX, and backend teams.
By 90 days: Elevate team-wide UI quality, accessibility, and architectural standards across shared component ecosystems.
TypeScript, React, Monorail Design System, Storybook, Figma, WebSockets, SSE, Docker, Kubernetes, Git/GitHub
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.
SimSpace is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws. We are committed to providing an inclusive and welcoming environment for all members of our staff, clients, volunteers, subcontractors, vendors, and clients.
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. We look forward to your application!
We also consider qualified applicants regardless of criminal histories, in accordance with applicable law. We are committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. If you need assistance or accommodation due to a disability, please contact careers@simspace.com .
SimSpace does not accept unsolicited resumes from employment agencies.
Actual compensation for the position is based on a variety of factors, including, but not limited to affordability, skills, qualifications and experience, and may vary from the range.
Cybersecurity simulation company providing realistic cyber ranges for elite security teams to train, test, and validate defenses.
Visit company websiteJobs and hiring trendsCRC 1500000-2500000 monthly / month
Full-time
Senior · 6+ years experience
Remote
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