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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr Principal Real-time Software Engineer - **Company:** RTX - **Location:** Tucson, AZ, United States - **Experience:** Expert - **Salary:** $132,400.0 - $251,600.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Assembly Language, Software Debugging, Linux, Device Drivers, Embedded C, Embedded Software, Firmware, Field-Programmable Gate Array (FPGA), Software Architecture, Real-Time Operating Systems, Systems Integration, Verilog, VHSIC Hardware Description Language (VHDL), VxWorks, Software Organization, SC Clearance, Bare Metal, Hardware Infrastructure - **Published:** June 2, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=f56c300989896039 ## About the Role Do you have experience in Systems integration?, * Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a 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 with the ability to obtain program access after start. Qualifications We Prefer * 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. ## Description Our Senior Principal Embedded Real-Time Software Developer/Integrator is a technical position that works in an Integrated Product Team (IPT) environment to architect, design, implement, test, debug, and deploy Software for Firmware (FPGA) and Hardware solutions that meet current and next generation autonomous avionics systems' needs. Working with a cross-discipline team, the candidate must have experience developing, testing, and integrating software for edge or embedded devices and/or subsystems (like telecom, medical, IoT, automotive, or robotics) where hardware operation, time critical function, functional reliability, mission assurance, and safety might be major concerns. The successful candidate will work with Product Owners, Chief Engineers, Management and other IPT members using Lean and/or Agile practices to ensure that embedded software is designed and developed to reliably operate toward the intended functions. This position is within the Effectors Center of the Software organization, and is an onsite role located in Tucson, AZ. What You Will Do * 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 guaranteed, measurable quality * Teaching, coaching, and mentoring less experienced staff * Contributing to proposals as well as preliminary and critical design reviews * Ability to obtain program access What You Will Learn * Working across a product line in collaboration with other teams, * Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products. * Clearance Information: This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm * Location Information: This position is onsite at our campus in beautiful Tucson, AZ. Tucson has a friendly, caring, and laid-back atmosphere, combined with the innovation and energy of a metropolitan region, and recognized as one of America's 10 Best Small Cities. Surrounded by beautiful mountains, colorful Sonoran Desert landscape and majestic saguaro cacti, Tucson is blessed with some of nature's best work. 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