Junior Operating Systems Engineer; Embedded Linux​/Yocto

Lyntris is a defense technology company that connects sensing to action across the connected battlespace. Lyntris brings together the talents of Accelint and Vitesse teams under one mission, with each contributing deep expertise within their domain. Combining differentiated hardware, software and mission expertise, Lyntris helps customers sense threats, make sense of complex conditions and act with greater speed, precision and confidence in contested environments.

Lyntris supports U.S. and allied defense organizations across every branch — including Navy, Army, Air Force, Space Force and allied partners — spanning strategic, operational and tactical missions and every domain:
Space, Air, Land, Sea and Cyber. With more than 200 active defense programs, Lyntris works at every level of the mission, from national command authority to the tactical edge.

Solutions are designed by operators who understand the mission, engineered for the conditions that degrade or defeat standard systems, and built on an open, modular architecture that integrates into existing programs without requiring them to start over. Lyntris moves faster than the traditional defense cycle — with integrated design, build and test capabilities in-house — and delivers systems that sustain and endure long after initial fielding.

• Junior Operating Systems Engineer (Embedded Linux / Yocto)
• Full time
• San Diego, CA – On‑Site

* This position requires an active U.S. national security clearance. To learn more about the security clearance process please access the link.

• Build and maintain custom Linux images using the Yocto Project (recipes, layers, Bit Bake, kernel configuration)
• Support an immutable, A/B‑updatable OS image architecture, including secure boot and update tooling
• Package, integrate, and troubleshoot system services, drivers, and third‑party software on embedded x86 hardware
• Contribute to OS hardening efforts (FIPS mode, secure boot, compliance‑driven configuration)
• Debug boot, kernel, driver, and userspace issues on real appliance hardware
• Use generative AI tools daily to accelerate development: writing and reviewing recipes, generating test scaffolding, drafting documentation, and debugging build failures
• Write clear documentation for build processes, image releases, and provisioning workflows

• Currently holds an active U.S. national security clearance or be able to receive and maintain one. To learn more about the security clearance process please access the link.
• Build and maintain custom Linux images using the Yocto Project (recipes, layers, Bit Bake, kernel configuration)
• Support an immutable, A/B‑updatable OS image architecture, including secure boot and update tooling
• Package, integrate, and troubleshoot system services, drivers, and third‑party software on embedded x86 hardware
• Contribute to OS hardening efforts (FIPS mode, secure boot, compliance‑driven configuration)
• Debug boot, kernel, driver, and userspace issues on real appliance hardware
• Use generative AI tools daily to accelerate development: writing and reviewing recipes, generating test scaffolding, drafting documentation, and debugging build failures
• Write clear documentation for build processes, image releases, and provisioning workflows

• Hands‑on experience with the Yocto Project, Buildroot, or another embedded Linux build system
• Exposure to Rocky Linux / RHEL‑family distributions
• Familiarity with secure boot, TPM, disk encryption, or FIPS 140‑3 concepts
• Experience with network security tooling (Suricata, Zeek, packet capture)
• Exposure to compliance frameworks (CMMC, NIST 800‑171)
• Basic C or Rust reading ability for kernel/driver troubleshooting
• Homelab, open‑source contributions, or relevant personal projects

Some positions will require access to U.S. National Security information. Positions that require this access will be required to receive and maintain a U.S. government personnel security clearance (PCL). In order to qualify for this position, the candidate must be a US citizen and either currently possess this National Security eligibility or be able to complete…