Principal Software Engineer

Raytheon; Tewksbury (MA); On-site; USD 140,000 - 210,000; Full time

Benefits offered by this job

Relocation eligible

Job summary

Raytheon Technologies seeks a Principal Software Development Engineer for the Patriot Software Team in Tewksbury, MA. You will design, develop, and maintain high-performance C/C++ applications for complex defense systems in a SCIF environment.

The role requires 8+ years in C/C++/embedded software, Unix/Linux, and the ability to obtain Interim Secret clearance. Onsite schedule (9/80 optional) with occasional light travel, relocation eligible, and a focus on delivering mission-critical software

Qualifications

• Bachelor's in STEM with 8+ years in C/C++ software.
• Experience in developing complex systems and embedded/RTOS.
• Experience in Unix/Linux operating systems.
• Ability to obtain Interim Secret clearance; US citizenship required.

Responsibilities

• Design, develop, and maintain software applications using C/C++ for complex Patriot systems.
• Collaborate with cross-functional teams to define and implement features.
• Troubleshoot and optimize code for performance in real-time environments.
• Participate in code reviews and enforce coding standards.
• Light travel and on-site SCIF work may be required.
• Exclusively onsite presence required.

Skills

C/C++

Java

Multithreading

Unix/Linux

RTOS

Education

Bachelor's degree in STEM

Tools

Git

Clearcase

Job description

Location: US-MA-TEWKSBURY-TB3 ~ 50 Apple Hill Dr ~ CONCORD BLDG, Tewksbury Tb3 300 Concord

Date Posted: 2026-06-10

Country: United States of America

Location: US-MA-TEWKSBURY-TB3 ~ 50 Apple Hill Dr ~ CONCORD BLDG, Tewksbury Tb3 300 Concord

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: Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date

At RTX, the world\'s largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Raytheon brings 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. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

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 and detail-oriented Principal Software Development Engineer with a focus on developing complex systems in C/C++ as part of our Patriot Software Team in Tewksbury, Massachusetts. The ideal candidate will have a passion for creating high-performance applications and will be involved in all stages of the software development lifecycle. Patriot is the world\'s pre-eminent air defense system, and we are currently developing software in support of new system capabilities. In this role, you will work closely with software developers, system architects, and product leads to ensure that the solutions we deliver meet our customers’ requirements. You’ll have the opportunity to work in a dynamic, fast-paced environment where your contributions will have a direct impact on the success of our products around the world.

The position works in a SCIF environment with an optional 9/80 schedule accommodate work/life balance practices.

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.
• Participate in code reviews and ensure adherence to coding standards and best practices.
• 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 bachelor’s in science, Technology, Engineering, or Mathematics (STEM) and a minimum of 8 years of experience.
• 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 in a Unix/Linux operating system.
• Ability to obtain Interim Secret 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.

Qualifications We Prefer

• Active Secret security clearance.
• 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.
• 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 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.

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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