Senior Backend Software Engineer – Attack and User Emulation Team

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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 core services for cybersecurity range simulation, focusing on scalability, performance, and fault tolerance. • Lead end-to-end technical projects, from requirements gathering and architecture design to deployment, while setting clear goals and priorities. • Mentor and support engineers on the team, promoting a collaborative culture and guiding them in coding best practices, testing, and architectural design. • Collaborate cross-functionally with Product Managers and UX Designers to translate requirements into technically sound, user-centered solutions. • 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. • Contribute to documentation that details technical architecture, system design, and best practices to ensure knowledge sharing and team alignment.

🎯 Requirements

• 6+ years of hands-on experience in software development with a strong focus on building large-scale, distributed systems. • Expertise in an OOP-based language such as Java or Kotlin, with a demonstrable understanding of API design, integration, and best practices. • 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 and project breakdown. • Knowledgeable in cyber security with a broad understanding of offensive and defensive security.

🏖️ Benefits

• 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.