Principal Software Development Engineer (El Segundo)

Date Posted : 2025-10-06 Country :

United States of America Location :

MA133 : Tewksbury, Ma Bldg 3 Concord 50 Apple Hill Drive Concord - Building 3, Tewksbury, MA, 01876 USA Position Role Type :

Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements :

Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance :

DoD Clearance : Secret

At Raytheon, the foundation of everything we do is rooted in our values and a higher calling to help our nation and allies defend freedoms and deter aggression. We bring the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of todays mission and stay ahead of tomorrows threat. Our team solves tough, meaningful problems that create a safer, more secure world.

We are seeking a skilled Principal Software Development Engineer with a focus on developing complex systems in C / C++. The ideal candidate will have a passion for creating high-performance applications and will be involved in all stages of the software development lifecycle.

You will work in Tewksbury, Massachusetts as part of the Patriot Software Development Team.

What You Will Do

Design, develop, and maintain software applications using C and C++ for complex systems and applications.

Collaborate with cross-functional teams to define, design, and implement new features, ensuring system integration and scalability.

Troubleshoot, debug, and optimize existing code for performance and efficiency in complex environments.

Write and maintain comprehensive documentation for software applications, including system architecture and design specifications.

Participate in code reviews and ensure adherence to coding standards and best practices.

Stay current with industry trends and advancements in C / C++ technologies, especially in relation to complex systems.

Light travel and off hours testing (2nd or 3rd shift) may occasionally be required.

This position requires exclusive onsite presence.

Qualifications You Must Have

Typically requires a bachelors in science, Technology, Engineering, or Mathematics (STEM) and a minimum of 8 years of experience.

Proven experience in developing complex systems and applications using C / C++, Java or other object-oriented programming language.

Experience in embedded systems, real-time systems, or large-scale applications.

Experience with multithreading, memory management, or performance optimization in complex environments.

Experience in a Unix / Linux operating system.

The ability to obtain and maintain an interim secret U.S. security clearance prior to the start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer

Active Secret security clearance.

Experience with data structures, algorithms, and software design principles, particularly in high-concurrency and distributed systems.

Experience with Network Communication Protocols, Shell Scripting (tcsh, csh, bash), software development tools like Git / Clearcase, software debuggers, and using embedded RTOSs (e.g. VxWorks, Integrity).

Experience with version control systems (e.g., Git).

Experience with software development methodologies (Agile, Scrum, etc.).

What We Offer

Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value : Safety, Trust, Respect, Accountability, Collaboration, and Innovation.

Relocation Eligible Relocation assistance available

Learn More & Apply Now!

Please consider the following role type definition as you apply for 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.

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

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 101,000 USD - 203,000 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 candidates 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 companys 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.

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