Principal Real-time Software Engineer

Principal Embedded Real-Time Software Developer/Integrator Position posted on 2026-05-14. Onsite location: Tucson, AZ. Security clearance: Active Secret U.S. government issued clearance required prior to start date; U.S. citizenship required for clearance. The position requires the ability to obtain program access after start. The role is within the Effectors Center of the Software organization. What You Will Do Architect, design, implement, test, and debug integrated embedded real‑time software within heterogeneous systems composed of firmware and hardware. Work within a cross‑discipline team to define, refine, and improve product concept, implementation, testability, and guaranteed, measurable quality. Teach, coach, and mentor less experienced staff. Contribute to proposals as well as preliminary and critical design reviews. Obtain program access as required. What You Will Learn Work across a product line in collaboration with other teams. Qualifications You Must Have Typical STEM degree and at least 8 years of relevant experience. Experience in at least two of: Embedded C++ Software, Embedded Software Security, Software Architecture Design and Implementation. Experience with embedded Real Time Operating Systems such as Green Hills, Integrity, Wind River VxWorks, Linux, etc. Experience developing complex systems involving integration of hardware, firmware, and software. Active and transferrable final Secret clearance 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 such as VHDL or Verilog. Familiarity with assembly language in at least one processor/controller family. Experience using lab instruments such as power supplies, digital multi‑meters, oscilloscopes, and logic analyzers. Experience developing device drivers for bare‑metal and/or OS applications. Experience leading engineering teams in delivering systems involving integration of hardware and software. What We Offer Values based on Safety, Trust, Respect, Accountability, Collaboration, and Innovation. Relocation offered based on eligibility. Salary range: $107,500 – $204,500 USD. Benefits include medical, dental, vision, life insurance, short‑term and long‑term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, parental leave, paid time off, and holidays. RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status. #J-18808-Ljbffr SwiftCruit