Senior Systems Software Engineer

Overview of Opportunity 

Two Six Technologies is actively seeking a Senior Systems Software Engineer to join our Digital Advantage team. The team is composed of intelligent individuals, passionate about Linux stack integration, systems programming in C and Python, low-level networking, and hardware-facing data center infrastructure. The team is growing and looking for someone with a Linux internals, PCIe architecture, and high-performance packet processing background that has an understanding on how to bring new commercial off-the-shelf (COTS) hardware and network components into a cohesive, production-ready platform and bring it to market. If you are actively using Linux kernel drivers, PCIe passthrough, kernel-bypass packet processing, out-of-band management interfaces, and platform security frameworks, the team wants to talk to you!

What you will do

• Implement C and Python systems programming tasks for low-level networking, hardware-facing code, and Linux kernel integration.
• Execute Linux internals work, including kernel module development, driver configuration, device enumeration, and system debugging below userspace. 
• Configure and integrate PCIe system architecture alongside high-performance networking offloads and out-of-band management interfaces. 
• Collaborate cross-functionally with mechanical and hardware engineers to integrate COTS components into fieldable, production-ready platforms. 
• Proactively communicate project status to team leads, provide technical insights to resolve customer issues, and present technical designs to unclassified and classified customer stakeholders.

What you will need (basic qualifications)

• Bachelor’s degree in Computer Science, Computer/Electrical Engineering, Systems Engineering, or a related technical domain, along with 9+ years of experience in systems programming, data center infrastructure, or network architecture.
• Deep expertise in systems programming in C and Python (low-level networking and hardware-facing code), Linux internals (kernel modules, drivers, device enumeration, debugging below userspace), and PCIe system architecture (topology, addressing, peer-to-peer, virtualization, and passthrough).
• Demonstrated experience in high-performance networking (kernel-bypass packet processing, hardware offload, line-rate data paths), out-of-band management (BMC and REST-based interfaces with automation), and cross-disciplinary collaboration with hardware and mechanical engineers.
• Active Top Secret Clearance with the willingness to speak with classified customers and the ability to work on-site at our Arlington, VA office.

Nice to have (preferred)

• Master's or Graduate degree in Computer Science, Computer Engineering, or a related technical domain, alongside an active Top Secret/SCI clearance.
• Experience with platform security frameworks (secure boot, roots of trust, attestation, cryptographic hardware, and compliance frameworks) and embedded/firmware tasks (cross-compilation for ARM, firmware provisioning, serial console, and out-of-band recovery).
• Familiarity with GPU compute architectures (CUDA and accelerated inference pipelines), network security monitoring (intrusion detection, traffic analysis, detection engineering), or live memory forensics.
• Hands-on experience with COTS hardware integration, automated test ranges, network deployment automation, and CI/CD infrastructure pipelines.
• Experience developing and deploying tailored offensive and defensive CNO capabilities through low-level systems development, network protocol analysis, and reverse engineering.

Security Clearance:

• Active Top Secret Clearance with ability to obtain SCI.

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