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# Principal Real-time Software Engineer

- **Company:** RTX
- **Location:** Tucson, AZ, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Agile Methodology, Software Debugging, Linux, Embedded C, Embedded Software, Firmware, Software Architecture, Real-Time Operating Systems, VxWorks
- **Published:** August 6, 2026
- **Apply:** https://us.experteer.com/career/view-jobs/principal-real-time-software-engineer-tucson-az-usa-58819621

## About the Role

in * Degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years of relevant experience * Experience in at least two areas: Embedded C++ software, Embedded software security, or Software architecture design and implementation * Experience with embedded RTOS (e.g., Green Hills, Integrity, Wind River VxWorks, Linux) * Experience integrating hardware, firmware, and software in complex systems * Active and transferable final Secret U.S. government issued security clearance (required prior to start) Key requirements * medical, dental, vision * life insurance * 401(k) match * flexible spending accounts * paid time off and holidays * relocation offered based on eligibility

## Description

Experteer Overview In this role you will architect, design, implement, test, and integrate embedded real-time software for firmware and hardware in heterogeneous systems. You'll work in a cross-discipline IPT to ensure measurable quality and robust operation of edge/embedded devices. You'll mentor teammates and contribute to design reviews and proposals. This onsite role in Tucson offers involvement across product lines and exposure to mission-critical, safety-sensitive software. You help shape next-generation autonomous avionics solutions within a fast-paced, Lean/Agile environment. Compensation / Benefits * Architect, design, implement, test, and debug embedded real-time software for firmware/hardware integrations * Collaborate with cross-discipline teams to improve product concept, implementation, and testability * Mentor and coach less experienced staff * Contribute to proposals and critical design reviews * Maintain eligibility to obtain program access and security clearance Tasks * Degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years of relevant experience * Experience in at least two areas: Embedded C++ software, Embedded software security, or Software architecture design and implementation * Experience with embedded RTOS (e.g., Green Hills, Integrity, Wind River VxWorks, Linux) * Experience integrating hardware, firmware, and software in complex systems * Active and transferable final Secret U.S. government issued security clearance (required prior to start) Key requirements * medical, dental, vision * life insurance * 401(k) match * flexible spending accounts * paid time off and holidays * relocation offered based on eligibility


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