RTX
aerospace and defense
SrPrincipalReal-timeSoftwareEngineer
Neural analysis suggests this role is
optimal for Senior candidates.
“Sr Principal Real-time Software Engineer at RTX. Skills: Embedded Real-Time Software, Software Architecture Design and Implementation, Integration of hardware, firmware, and software, Embedded C++ Software. Architecting, designing, implementing, testing, and debugging integrated embedded real-time software within heterogenous systems composed of firmware and hardware. Working within a cross-discipline team to define, refine, and improve product concept, implementation, testability, and guarantee”
What You'll Achieve.
Meet current and next generation autonomous avionics systems’ needs; Complete the mission; Deliver superior solutions; Further our vision to be the global leader in core and next-generation weapon and security solutions
Industry & Context.
Active and transferable U. S. government issued security clearance is required prior to start date, U. S. citizenship is required, Secret - Current Security Clearance Type, Active and existing security clearance required on day 1, Ability to obtain program access, Onsite role
What They're Looking For.
Must Have
Degree in Science, Technology, Engineering or Mathematics (STEM), Minimum of 10 years of prior relevant experience, Experience including at least two of the following: Embedded C++ Software, Embedded Software Security, Software Architecture Design and Implementation, Experience using embedded Real Time Operating Systems (RTOS) (e.g., Green Hills, Integrity, Wind River VxWorks, Linux, etc.), Experience developing complex systems involving the integration of hardware, firmware, and software, Active and transferable Secret U. S. government issued security clearance is required prior to start date, Ability to obtain program access after start
Nice to Have
Familiarity with rate monotonic theory, practice, and limitations, Familiarity with layered architectural principles, and their limitations, Familiarity with reading electrical schematics and relating it to software function, Familiarity with reading firmware source like VHDL or Verilog, Familiarity with assembly language in at least one processor/controller family, Experience using lab instruments like power-supplies, digital multi-meters, oscilloscopes, and logic analyzers, Experience with developing device drivers for bare-metal and/or OS applications, Experience leading engineering teams in delivering systems (of various size) involving the integration of hardware and software
What You'll Do.
and debugging integrated embedded real-time software within heterogenous systems composed of firmware and hardware
Working within a cross-discipline team to define
and improve product concept
Contributing to proposals as well as preliminary and critical design reviews
Developing software for Firmware (FPGA) and Hardware solutions that meet current and next generation autonomous avionics systems’ needs
and integrating software for edge or embedded devices and/or subsystems where hardware operation
time critical function
functional reliability
and safety might be major concerns
Ensuring that embedded software is designed and developed to reliably operate toward the intended functions
How You'll Work.
Team & Collaboration
Working within an Integrated Product Team (IPT) environment; Working with a cross-discipline team; Working with Product Owners, Chief Engineers, Management and other IPT members; Working across a product line in collaboration with other teams
Process & Methodology
Leading engineering teams in delivering systems (of various size) involving the integration of hardware and software
Full Job Description
**Date Posted:** 2026-05-14 **Country:** United States of America **Location:** US-AZ-TUCSON-805 ~ 1151 E Hermans Rd ~ BLDG 805 **Position Role Type:** Onsite **U.S. Citizen, U.S. Person, or Immigration Status Requirements: ** Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance **Security Clearance Type:** Secret - Current **Security Clearance Status:** Active and existing security clearance required on day 1 At RTX, the world largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense. The Software organization develops software applications, including integration and test on missiles, launchers, radars, naval systems, fire control and other complex systems. Our precision software and firmware integrate operating systems, device drivers, networking, and control software to bring together sensor, guidance, and flight control processing features to complete the mission. The Software org is made up of several Centers located across the country, responsible for all aspects of the software development lifecycle. Our 4000+ software engineers design, develop, and build innovative solutions for our customers. Join our fast-
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