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Job description
The weaponization of AI is driving a paradigm shift in the cyber security industry from proactive to preemptive security: clients must now invest more intelligence and effort in understanding their vulnerabilities before their adversaries do (Open AI). The only way to achieve this is to simulate future attack scenarios at scale, and to run them in high fidelity digital replicas of production environments (Gartner/Forrester). SimSpace serves as the AI Proving Grounds to generate hypersynthetic data which pressure tests controls, tools, teams, and agentic capabilities in full kill chain attacks hidden in realistic environmental traffic and patterns of life.
Founded in 2015 by experts from U.S. Cyber Command and MIT Lincoln Laboratory, the platform was initially conceived to assist in Offensive Cyber Operations (OCO), to quickly replicate target environments to conduct mission rehearsal of human operators and their tools to deny (disrupt, degrade, destroy) or deceive (manipulate or exfiltrate data) adversaries. The company has since expanded to serve over a dozen allied governments in OCO/DCO as well as critical infrastructure enterprises around the world. The company is actively investing in the Americas, Asia Pacific, Europe and the Middle East through direct sales and channel partners. SimSpace has launched the AI Proving Grounds Consortium, leading the revolution by creating an open platform for the InfoSec ecosystem to train, validate and operationalize their agentic capabilities before committing to production.
Why join SimSpace?
We are a team united by a shared purpose and four core values: Serve to Protect, Acquire Understanding, Teamwork without Borders, and Operate as Innovators. We value candid, constructive feedback and create opportunities for personal, professional, and financial growth. Our vision, “Defend the Free World,” drives our mission: “Defeat Any Adversary in Any Cyber Terrain at Machine Speed.”
How Do We Work?
We listen to customers and colleagues, challenge assumptions, and turn ideas into meaningful results. We expect everyone to embrace emerging technologies, simplify and automate work, and use AI to learn, solve problems, and help deliver quality with speed. We apply human judgment and take responsibility for outcomes. Whether remote or office-based, we collaborate across teams and time zones.
We invite you to apply today!
We are looking for a Senior Full Stack Engineer to build the operator experience for SimSpace’s internet simulation platform. This engineer will turn the platform’s control-plane capabilities into intuitive workflows for configuring simulated services, registering personas, managing topology, provisioning applications, integrating ranges, and monitoring platform state.
The role will work closely with the backend engineer who owns the control-plane API, event-driven orchestration, persistence, and deployment model. While the primary focus will be building the frontend experience in React and TypeScript, this engineer will also contribute to backend services and integration layers where needed. The ideal candidate is comfortable moving across the stack, translating complex distributed-system behavior into clear user experiences, and building interfaces that remain understandable when operations are asynchronous, long-running, or partially successful.
What you will help build
The web-based operator experience for configuring and managing the internet simulation platform across multiple ranges and environments
React and TypeScript workflows for creating services, registering personas, managing topology, provisioning simulated SaaS applications, delivering scenario content, and querying platform state
Reusable frontend architecture, components, and design patterns that support a growing collection of platform capabilities
Integration between the frontend and the control-plane API, including authentication, authorization, validation, error handling, asynchronous operations, and real-time status updates
Operational views that make platform state, deployment health, range connectivity, failures, and recovery actions understandable to users
Backend endpoints, service integrations, and supporting logic in collaboration with the engineer who owns the control plane
Testing and delivery practices that allow the frontend and backend to evolve together without breaking operator workflows
What you will do
Design and build the platform’s frontend using React and TypeScript, creating clear workflows for technically sophisticated operators
Translate complex platform operations—such as standing up a range, registering a persona, provisioning a service, or updating topology—into intuitive, observable user experiences
Build reusable components and frontend patterns for forms, resource configuration, status reporting, validation, error handling, and long-running operations
Integrate the frontend with the control-plane API, ensuring API contracts are used consistently and failures are presented with enough context for users to understand and recover
Partner with the backend engineer on API design so that frontend requirements, user workflows, and operational needs are reflected in the platform’s interfaces
Contribute to backend services and integration layers where needed, including implementing supporting endpoints, evolving data models, and troubleshooting cross-stack issues
Develop views for platform health, range connectivity, service lifecycle, operation history, and partial-failure recovery
Implement appropriate state-management and data-fetching patterns for a multi-tenant platform with asynchronous and event-driven backend behavior
Build automated tests across the frontend stack, including component, integration, and end-to-end coverage for critical operator workflows
Improve frontend performance, accessibility, security, and maintainability as the product and engineering team grow
Collaborate with product, design, backend, network simulation, and SRE partners to deliver cohesive features across the full platform
Help establish frontend development standards, code-review practices, observability, release processes, and documentation for the user experience
Who you are:
Strong experience building production web applications with React and TypeScript
Experience designing and delivering complex operator interfaces, administrative consoles, infrastructure-management products, or other workflow-heavy applications
Strong frontend architecture skills, including component design, application state management, data fetching, routing, forms, validation, and error handling
Experience integrating frontend applications with RESTful or similar platform APIs
An understanding of asynchronous and distributed-system behavior and the ability to represent long-running operations, partial failures, retries, and eventual consistency clearly in a user interface
Backend development experience, preferably with Kotlin and Spring Boot, or the ability to become productive in that stack
Experience collaborating on API schemas and contracts with backend engineers
Strong testing practices across unit, component, integration, and end-to-end testing
Familiarity with authentication, authorization, secrets handling, and secure frontend development
Experience instrumenting applications so that failures can be diagnosed across browser, API, and backend service boundaries
Strong product and user-experience instincts, particularly when simplifying technically complex workflows
Clear communication skills and the ability to work closely with engineers across frontend, backend, infrastructure, and operations
We’re proud to offer a competitive and comprehensive package designed to support your well-being, growth, and success:
Compensation. Base monthly pay range: 1,500,000 CRC - 2,500,000 CRC reflecting our confidence in your expertise and impact, with the opportunity for annual bonuses tied to company performance and individual contributions.
• Health & Wellness. Private medical, dental, vision, and life benefits.
• Mental Health Support. Access to company-paid counseling, coaching, and resources for you and your family through Spring Health.
• Parental Leave. Paid leave plans to support you and your loved ones during life’s most important moments.
• Ownership Opportunities. Equity stock options at hire, with annual performance-based grants—become an invested stakeholder in our shared success.
• Continuous Learning. Access a LinkedIn Learning membership to prioritize your personal and professional development.
• Social Connections. Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community.
SimSpace is an Equal Opportunity Employer:
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.