Sr Principal Real-time Software Engineer

Senior Principal Embedded Real-Time Software Developer/Integrator Location : Tucson, AZ (Onsite) Security Clearance : Secret-level U.S. government issued clearance required prior to start date. About the Role Technical leadership role within the Effectors Center of our Software Engineering Directorate. Responsibilities include architecting, designing, implementing, testing, debugging, and deploying embedded real‑time software that interfaces with firmware and hardware for autonomous avionics systems. Responsibilities Lead the design and implementation of embedded real‑time software for heterogeneous systems composed of firmware and hardware. Collaborate with cross‑discipline teams (product owners, chief engineers, managers) to refine product concepts and ensure high quality and testability. Provide technical mentorship, coaching, and guidance to junior staff. Contribute to proposals, preliminary design reviews, and critical design reviews. Support program access and security clearance requirements. Qualifications Degree in STEM field and minimum 10 years of relevant experience. Experience with Embedded C++ Software or Embedded Software Security and Software Architecture Design. Hands‑on experience with embedded RTOS (e.g., Green Hills, Integrity, Wind River VxWorks, Linux). Proven track record integrating hardware, firmware, and software into complex systems. Must obtain interim Secret clearance and U.S. citizenship. Preferred Qualifications Familiarity with rate‑monotonic scheduling theory and layered architectural principles. Experience reading electrical schematics, VHDL/Verilog firmware source, and assembly code for a processor family. Hands‑on lab instrument experience (power supplies, multimeters, oscilloscopes, logic analyzers). Experience developing device drivers for bare‑metal and/or OS applications. Leadership experience delivering integrated hardware/software systems of various sizes. Benefits Salary range: $132,400 – $251,600 USD. Health, dental, vision, life insurance, short‑term and long‑term disability, 401(k) match. Flexible spending accounts, employee assistance program, parental leave, paid time off, and holidays. Potential annual incentive compensation based on role level. Relocation assistance available upon eligibility. EEO Statement 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 Prattwhitney