Software Engineer

We’re hiring a Senior Software Engineer to lead and build software for tactical/mission-critical defense systems. You’ll help design modern, modular software frameworks and support software products ranging from analysis/simulation tools to mission planning and other critical system components. This is a hands-on technical leadership role with real impact.

What you’ll do

• Provide technical leadership for a team of 5-15 software engineers
• Define full-stack architecture and design patterns for missile-system applications (guidance, navigation, control, telemetry, mission planning)
• Lead technical/design/code reviews to ensure quality and compliance
• Make key technical decisions on tools, frameworks, and development approaches
• Act as a primary technical partner to government stakeholders and program leadership
• Mentor junior and mid-level engineers
• Drive open systems architecture and MOSA (Modular Open Systems Approach) adoption
• Support flight test operations and post-test analysis
• Ensure compliance with safety, cybersecurity, and RMF-related standards

• Bachelor’s degree in a technical field (Software Engineering, CS, CE, EE, Aerospace, Math, or similar) with 3.0+ GPA
• 12+ years relevant experience (or 10+ with a Master’s)
• Active Secret clearance or ability to obtain one
• Proven experience leading software teams on complex, multidisciplinary work
• Strong knowledge of open systems architectures and MOSA
• Expert-level C/C++
• Experience with Python and Java
• Experience with real-time embedded systems / RTOS (e.g., VxWorks, FreeRTOS)
• Strong communication skills (able to present to senior leaders and government stakeholders)

Nice-to-haves

• Defense, aerospace, weapons, or embedded missile systems background
• Open architecture frameworks (e.g., FACE, OMS, SOSA)
• Containerization/microservices (Docker/Kubernetes) and CI/CD
• MBSE / SysML
• Standards like DO-178C or MIL-STD-882E
• MATLAB/Simulink
• Prior Software Lead / IPT Lead / Technical Lead experience
• Agile Scrum Master / Product Owner experience

Type: Contract-to-hire Work schedule: 40 hours/week Security clearance: Active Secret clearance or ability to obtain Pay rate: $117-125/HR

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.