Principal Software Engineer - Onsite

Location: US-RI-PORTSMOUTH-PS1 ~ 1847 W Main Rd ~ NIMITZ BLDG

Time Type: Full time

Job Description

Date Posted:

2026-03-09

Country:

United States of America

Location:

US-RI-PORTSMOUTH-PS1 ~ 1847 W Main Rd ~ NIMITZ BLDG

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 Type:

DoD Clearance: Secret

Security Clearance Status:

Active and existing security clearance required on day 1

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 today’s mission and stay ahead of tomorrow’s threat. Our team solves tough, meaningful problems that create a safer, more secure world. 

We are seeking a skilled Principal Software Engineer to join our Radar Digital Product Line team.  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 onsite in Portsmouth, Rhode Island. 

What You Will Do:

• Develop robust and scalable software in C++ running on Linux or UNIX operating systems using Agile development methods

• Design, implement, test, and maintain radar software applications, while ensuring system integration and scalability.

• Create/update MATLAB scripts for use in verifying software requirements

• Tackle difficult problems and successfully deliver results on schedule

• Participate in design/code/test 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 and continuous delivery.

Qualifications You Must Have:

• Typically requires a bachelor’s in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 8 years of experience.

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

• Experience in software design, integration and test utilizing C / C++ in a Real-time, multi-threaded software development environment.

• Experience in a Unix/Linux operating system

Qualifications We Prefer:

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

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

• Familiarity with software development methodologies (Agile, Scrum, etc.).

• Software development experience in a DoD environment

• Experience with Network Communication Protocols, Shell Scripting (ksh, csh, bash, Perl), software development tools like Git/Clearcase, software debuggers (GDB), LINUX/UNIX text editors (vi/Gvim/Emacs), and MATLAB

• Experience leading small projects/efforts.

• Experience providing technical guidance/mentorship to junior engineers

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. 

Learn More & Apply Now!

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), 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 107,500 USD - 204,500 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.

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