Senior Software Engineer, Network Simulation

🔥 0 minutes ago

🇺🇸 United States – Remote

💵 $160k - $225k / year

⏰ Full Time

🟠 Senior

🛜 Network Engineer / Network Administrator

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SimSpace

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2015

💼 Consulting

🎖️ Defense

🔒 Cybersecurity

🔥 Funding within the last year

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

Consulting • Defense • Cybersecurity

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

• Serve as technical lead for SimSpace's internet simulation platform • Own the end-to-end architecture of the eBPF-based routing simulation layer, including XDP and TC hook point design, BPF map structure, and synthetic ICMP TTL-exceeded generation • Design and build the control-plane topology database and pipeline for compiling real-world internet topology data • Architect the in-range proxy agent for local topology configuration, DNS delegation, and traffic forwarding • Define the control-plane and in-range-agent interface contract, including topology updates, graceful degradation, and agent lifecycle management • Make daily architectural decisions, conduct design reviews, and maintain engineering quality across the team • Partner with engineers on simulation challenges and shape the technical roadmap • Mentor engineers in systems design, kernel-level debugging, and engineering rigor • Collaborate with platform teams on the operational model for a long-lived, multi-tenant service serving active cyber range deployments

🎯 Requirements

• Deep expertise in Linux kernel networking and eBPF program development, including XDP, TC hooks, and BPF map types • Strong systems programming skills in C or Rust for eBPF development • Go or Python experience for control-plane agents and tooling • Solid understanding of BGP, ASN topology, CIDR allocation, and inter-AS peering • Experience designing systems with control-plane and data-plane separation • Demonstrated technical leadership setting architectural direction and driving engineering quality across a team • Comfort taking research proofs of concept into reliable production systems at scale • Familiarity with Kubernetes for control-plane services and distributed agents • Experience with network simulation, traffic shaping, or cyber range infrastructure is a strong plus • Prior cybersecurity, defense, or government-adjacent experience is a plus • Ability to verify identity and eligibility to work in the United States • Proof of U.S. citizenship required at time of hire

🏖️ Benefits

• Annual bonuses tied to company performance and individual contributions • Comprehensive medical, dental, and vision benefits • Savings plans with coverage starting on day one • Company-paid counseling, coaching, and family resources through Spring Health • 401(k) retirement savings plan with company match • Unlimited vacation • Dedicated health & wellness days • Paid parental leave • Equity stock options at hire • Annual performance-based equity grants • $1,500–$3,500 employee referral rewards for every qualified hire • Full- and partial-subsidized Peloton membership plans • Peloton equipment discounts • LinkedIn Learning membership • Monthly reimbursements for meaningful connections with teammates through SocialSpace Community • Legal plan coverage • Pet insurance • Wellness reimbursements • Flexible remote work arrangement