Senior Software Engineer, Networking
- Compensation
- $165K–$225K / yr
- Location
- Remote - U.S.
- Work setup
- Remote
- Seniority
- Senior
- Employment
- Contract
- Experience
- Not specified
- Category
- Software engineering
- Posted
Skills
Must have
- Experience building SDN controllers or control planes with OpenFlow, OVS, or equivalent interfaces
- Deep expertise in Linux kernel networking and eBPF program development, including XDP, TC hooks, BPF map types, and the tradeoffs involved in kernel-space packet processing
- Strong systems programming skills — C or Rust for eBPF program development, and Go or Python for the control-plane agent and tooling layer
- Solid understanding of real-world internet routing — BGP, ASN topology, CIDR allocation, inter-AS peering — sufficient to model it faithfully without running routing software
- Experience designing systems with well-defined control plane and data plane separation, particularly where distributed components may have intermittent connectivity to a central controller
- Demonstrated technical leadership: you have set architectural direction and driven engineering quality across a team, whether as a tech lead, principal, or senior-plus individual contributor
- Comfort at the intersection of research and production engineering — this role involves taking a proof of concept and building it into something that runs reliably at scale
- Familiarity with Kubernetes as the deployment environment for both control plane services and distributed agent components
- Experience with network simulation, traffic shaping, or cyber range infrastructure is a strong plus
- Prior work in cybersecurity, defense, or government-adjacent environments is a plus given SimSpace's customer base
Full description
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.
Why join SimSpace? We are an organization that is focused on building our culture and mindfully enhancing our atmosphere every day which is why we have collaborated on an integral value system. Our governing philosophy of being Human Centered is deeply embedded within our value system. We apply this philosophy to every one of our internal team members, external clients, and their customers.
How Do We Work? We believe that people are at the center of everything we do. SimSpace fosters a culture of continuous learning, curiosity, and professional growth. That 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.
Who Thrives Here? 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.
We invite you to apply today!
We are looking for a Senior Software Engineer to serve as the technical lead for SimSpace's internet simulation platform — the system that makes cyber range environments behave like the real internet at the network layer. This is foundational, novel work: you will be designing and building a kernel-level simulation layer that reproduces the observable behavior of worldwide internet routing — correct ASN topology, realistic inter-AS latency, accurate traceroute and MTR output — without instantiating a single virtual router. The approach is grounded in a patent pending eBPF-based architecture developed at SimSpace, and this role will take that proof of concept into a production-grade system. As the technical lead on a newly formed team, you will set architectural direction, mentor peer engineers, and partner closely with a Principal Engineer and your Engineering Manager to build something that does not yet exist at this fidelity in the industry.