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Principal HWIL Software Engineer

RTX (Raytheon)Us-Az-Tucson-805 ~ 1151 E Hermans Rd ~ Bldg 805, AZFull-time107500-204500

This principal-level position involves architecting and implementing software solutions for sophisticated missile flight simulator facilities that serve as the final validation step before actual flight testing. You'll work alongside weapon system engineers to translate requirements into robust real-time software implementations, handle system integration across hardware and firmware components, and establish software standards and best practices across the organization. The role suits experienced embedded systems engineers who thrive in defense-critical environments, have deep expertise in real-time software architectures, and can mentor junior developers while driving innovation in testing infrastructure. You'll split time between hands-on development in C++ and Python, system-level design decisions, and collaborative problem-solving with hardware teams and program stakeholders.

Requirements

Bachelor's degree in Computer Science, Engineering, or STEM field with minimum 8 years of relevant experienceAdvanced proficiency in C++, Python, or other object-oriented languages with strong data structures and algorithms knowledgeDemonstrated expertise in embedded software, embedded operating systems (Linux, RTOS, VxWorks), or software architecture designActive and transferable Secret U.S. government security clearance required at startExperience with real-time software integration, Agile development lifecycle, and software requirements definitionU.S. citizenship required for security clearance eligibility

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Listed July 28, 2026 · Verify details with the employer before applying.

About RTX (Raytheon)

Tucson houses Raytheon's missile and defense HQ producing precision-guided systems, and has flight-tested an AI/ML-powered Radar Warning Receiver.

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