Staff Software Engineer – Attack & User Emulation Team

🕒 2 days ago

🇺🇸 United States – Remote

💵 $185k - $260k / year

⏰ Full Time

🔴 Lead

🧑‍💻 Full-stack Engineer

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SimSpace

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2015

🔒 Cybersecurity

☁️ SaaS

🏛️ Government

🔥 Funding within the last year

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

Cybersecurity • SaaS • Government

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

• Design, develop, and maintain the core services for offensive cybersecurity and user emulation in our range simulation environment, focusing on scalability, performance, and fault tolerance. • Own and drive end-to-end technical projects, from requirements gathering and architecture design to deployment, defining scope, identifying risks, and aligning stakeholders across teams while setting clear goals and priorities. • Mentor and support engineers on the team; promote a collaborative culture and guide the team in coding best practices, testing, and architectural design. • Define and evangelize technical architecture, system design, and best practices through documentation, design reviews, and team forums to ensure knowledge sharing and alignment. • Collaborate with Product Managers and UX Designers to create user-centered solutions that are technically robust and aligned across all departmental priorities and the needs of the business. • Take ownership of cross-team outcomes ensuring technical decisions, interfaces, and delivery commitments reflect the needs of the broader organization, not just internal team goals. • Partner with other engineering teams, treating those teams as customers. • Conduct code reviews and provide constructive feedback to ensure code quality, performance, and adherence to company standards. • Implement robust monitoring and alerting strategies to maintain high uptime and quick response to potential system issues. • Ensure services meet security and compliance standards by integrating appropriate controls into the development lifecycle.

🎯 Requirements

• 8+ years of hands-on experience in software development with proven skills in building large-scale, distributed systems. • Expertise in an OOP-based language such as Java or Kotlin, with a demonstrable knowledge of API design, integration, and best practices. • Experience with event-driven architectures and messaging systems (e.g., Kafka, RabbitMQ, or similar). • Proven experience with unit testing, integration testing, and deploying services in Kubernetes or a similar container orchestration platform. • Demonstrated ability to design, build, and operate fault-tolerant systems, including experience in requirements gathering, risk identification, project breakdown, and sequencing for efficient development. • Strong communication skills to present and articulate designs to technical and non-technical audiences, including experience leading architecture reviews and influencing technical direction. • Understanding of offensive security methods and tactics. • Knowledge of networking concepts including DNS, TCP/IP, routing protocols.

🏖️ Benefits

• 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. • 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. • 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.