Senior Software Engineer, Backend (OS)

SimSpace Corporation

7d

About The Position

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. 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. SimSpace fosters a culture of continuous learning, curiosity, and professional growth. This belief shows up in action: 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. We are a team of innovators, protectors, and problem-solvers. We believe diversity of thought and experience fuels better solutions, and we’re committed to building teams that reflect the communities we serve. Whether you’re remote or office-based, you’ll collaborate with talented colleagues across departments and time zones, united by the mission to create a safer digital world.

Requirements

• 6+ years of hands-on software engineering experience delivering and operating production software.
• Deep practical experience with Windows or Linux systems development, working below application-level abstractions (e.g., native APIs, process/session management, eBPF, IPC, or security contexts).
• Strong proficiency in Go, or demonstrated expertise in another systems language with the ability to become productive in Go quickly.
• Experience with JVM languages (Kotlin/Java) and message-driven, asynchronous architectures.
• Demonstrated ability to reason about complex OS failure modes, trade-offs between fidelity and complexity, and distributed system stability.

Nice To Haves

• Building production endpoint, monitoring, remote management, or EDR/security agents.
• Experience with desktop/browser automation, accessibility APIs, or computer vision.
• Familiarity with hypervisors, VDI, endpoint security telemetry, adversary emulation, or tool integration for AI agents.

Responsibilities

• Design, build, and operate production software in Go, python, and Kotlin for attack and user emulation frameworks.
• Develop deep operating-system integrations on Windows and Linux using native OS APIs, session management, process execution, and system facilities.
• Improve system reliability, security, testability, and observability across message-driven architectures operating at scale.
• Solve high-fidelity emulation problems, including desktop/web automation, privilege boundaries, input simulation, and realistic user timing.
• Collaborate with backend, security, and AI engineering teams to define reusable primitives and APIs.
• Conduct code and design reviews, mentor team members, and elevate the team's platform-level engineering craft.

Benefits

• 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
• Opportunity for annual bonuses tied to company performance and individual contributions.
• Private medical, dental, vision, and life benefits.
• Access to company-paid counseling, coaching, and resources for you and your family through Spring Health.
• 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
• Access a LinkedIn Learning membership to prioritize your personal and professional development.
• Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed