Senior Software Engineer - Top Secret, Onsite,

Date Posted 2026-06-02 Location United States of America – El Segundo, CA. Employment Type Onsite. Requires U.S. citizenship and an active transferable U.S. Government issued Top Secret security clearance. What You Will Do Support all aspects of the software development life cycle within a multi‑disciplined team. Work on new and legacy military and commercial programs, from concept and requirements through design, development, integration, test and maintenance. Use creative solutions to complex technical system and software integration problems. Collaborate closely with Systems Engineers to design solutions that meet end‑user and operational needs. Occasional business‑related travel may be required. Qualifications You Must Have Degree in Science, Technology, Engineering or Mathematics (STEM). Minimum of 5 years of relevant professional experience. Experience in C++ design paradigms on Linux, VxWorks or other RTOS. Experience developing, testing, and integrating real‑time software written in C++. Experience with shell, Perl, or Python scripting. Active and transferable U.S. Government issued Top Secret security clearance and U.S. citizenship. Qualifications We Prefer Additional experience coding in C, C#, Java or related languages. Experience working in laboratory with physical hardware (test benches, simulators). Ability to quickly understand and navigate complex systems and established code bases. Experience with Agile Scrum techniques in product development. What We Offer Salary range: $95,500 – $181,700 USD. Total rewards package including healthcare, wellness, retirement, work/life benefits, education assistance, parental leave, flexible work schedules and more. Equal Opportunity Employer 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