Senior Principal Software Engineer

Company: RTX
Location: Anaheim
Posted on: April 1, 2026

Job Description:

Date Posted: 2026-03-18 Country: United States of America Location: US-CA-ANAHEIM-406 ~ 160 N Riverview Dr ~ BLDG 406, Ste 150 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.? U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance Type: TS/SCI with Polygraph Security Clearance Status: Active and existing security clearance required after day 1 Raytheon Company Managed by Collins Aerospace This role is primarily On-Site, with flexibility at hiring manager discretion. Applied Signal Technology (AST) is seeking a Senior Principal Software Engineer with deep expertise in Global Navigation Satellite Systems (GNSS) operating within a complex electronic warfare environment to lead the development of multi-sensor guidance and navigation systems. AST provides trusted strategic and tactical SIGINT solutions that secure the interests of the U.S. and its partners. AST’s work in areas such as high-capacity broadband communications, signal processing and analysis, tactical SIGINT, and wireless communications continually challenges our extraordinary engineers to resolve problems and make the world a safer place. AST’s work environment is dynamic, highly collaborative and provides engineers with the freedom to strengthen and expand their skills, explore new and creative ideas, and work closely with our nation’s finest service members all while embracing integrity, innovation and work-life balance. We are seeking an innovative and mission-driven Senior Principal Software Engineer with deep expertise in Navigation Warfare (NAVWAR), GNSS systems, and System-on-Chip (SoC) development. This position plays a key role in the design, development, and deployment of innovative technologies related to jamming, spoofing, and high-performance navigation and timing solutions in contested and denied environments. As a technical leader, you will contribute to software architectures that tightly integrate with custom SoC platforms and provide advanced PNT capabilities across space, airborne, and ground-based systems. You will be expected to bring deep software engineering expertise while collaborating closely with systems, FPGA, RF, and cyber teams. This is an ONSITE position located at our Anaheim Hills, CA location. To find out more about AST please, click the link below: Applied Signal Technology: WHO WE ARE What You Will Do: Lead the software design and development of NAVWAR-enabled GNSS receivers and PNT systems running on custom SoC platforms. Architect and implement embedded software for real-time, secure navigation processing in hardware-constrained environments. Collaborate with SoC and FPGA engineers to define hardware/software partitioning and system interface layers. Perform system-level integration and testing, including hardware-in-the-loop (HIL) and RF simulation environments. Support mission-critical NAVWAR systems from inception to prototype, including field testing and customer engagement. Travel up to 25% Qualifications You Must Have: Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience 10 years of professional experience in software engineering, with significant contributions to embedded or real-time systems. Proven experience with GNSS software development, including signal processing, tracking loops, or navigation algorithms. Preference given to expertise related to spoofing/jamming mitigation, signal integrity, and advanced GNSS signal processing. Integrate GNSS algorithms, anti-jam/anti-spoofing techniques, and NAVWAR mission features into software-defined radio (SDR) or SoC platforms. Deep understanding of NAVWAR concepts, including threat mitigation (jamming/spoofing), signal protection, and secure PNT. Proficiency in C/C++, real-time operating systems (RTOS), and low-level driver development. Experience working with secure coding practices and embedded systems in a defense or aerospace context. Familiarity with lab tools and environments including hardware-in-the-loop (HIL), GNSS signal simulators, and SDR platforms (e.g., USRP, Ettus, or custom boards). Ability to obtain and maintain a Top-Secret SCI (TS/SCI) U.S. government issued security clearance with polygraph is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Qualifications We Prefer: Master’s degree in Computer Engineering, Electrical Engineering, Computer Science, Mathematics, or related field. Experience with military-grade GNSS receivers. Familiarity with DO-178C, MIL-STD-1553, Ethernet, or other mission bus protocols. Experience with DevSecOps pipelines, containerization (Docker), and CI/CD in secure environments. Existing Top Secret SCI (TS/SCI) security clearance with polygraph within the last 24 months. What We Offer? Medical, dental, and vision insurance ? Three weeks of vacation for newly hired employees ? Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option ? Tuition reimbursement program ? Student Loan Repayment Program ? Life insurance and disability coverage ? Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection ? Birth, adoption, parental leave benefits ? Ovia Health, fertility, and family planning ? Adoption Assistance ? Autism Benefit ? Employee Assistance Plan, including up to 10 free counseling sessions ? Healthy You Incentives, wellness rewards program ? Doctor on Demand, virtual doctor visits ? Bright Horizons, child and elder care services ? Teladoc Medical Experts, second opinion program ? Eligible for relocation And More! Learn More & Apply Now!? Do you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions — whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today. ? *Please ensure the role type (defined below) is appropriate for your needs before applying to this role. 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. AST As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. The salary range for this role is 145,600 USD - 276,800 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills. Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement. Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance. This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply. RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window. 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, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. Privacy Policy and Terms: Click on this link to read the Policy and Terms

Keywords: RTX, Thousand Oaks , Senior Principal Software Engineer, IT / Software / Systems , Anaheim, California