Principal Software C/C++ Engineer

RTX; North Tewksbury (MA); On-site; USD 108,000 - 205,000; Full time

Benefits offered by this job

Relocation eligible.

Job summary

RTX seeks a Senior Software Engineer to join our Tewksbury team. You will work on real-time embedded and application software across multiple programs, collaborating with engineering to deliver solutions.

Responsibilities include design, coding, testing, and documentation, with a focus on meeting performance and reliability targets. On-site position with potential relocation support and US government program involvement.

Qualifications

• Typically requires STEM degree and extensive relevant experience.
• Experience with C++, C and/or Java.
• Ability to obtain and maintain an Interim Secret U.S. government clearance.
• U.S. citizenship is required for security clearance eligibility.

Responsibilities

• Assist and participate in requirements, design, development and testing of real-time embedded software and tools.
• Design, code, test, integrate and document software solutions.
• Participate in internal review of software components and systems.
• Collaborate with project managers and other professionals within Engineering.
• Follow established development practices to maintain software configuration management.

Skills

C++

C

Java

Real-time embedded software

Software development lifecycle

Education

Bachelor's degree in STEM

Tools

Git

Jira

Jenkins

Perl

Bash

Kornshell

Windows OS

Linux OS

Job description

Date Posted: 2026-06-18 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.

We are seeking Senior Software Engineers to join our development team in Tewksbury, Massachusetts.

All teams develop software in a variety of languages including C++, C, and several others. Candidates can expect to work on many if not all the phases of the software development life cycle. In this position, you will be responsible for providing practical solutions to difficult technical software problems. You can expect to support multiple programs and multiple platforms within a software product line. Software Engineering positions include working on a variety of different tasks including real-time software development, application software development, test and verification, data analysis, software tools development, and many others. This role will be 100% on-site in Tewksbury, Massachusetts.

What You Will Do

• Assist and participate in the requirements, design, development and testing of real-time embedded software, application software, and tools, to include development of new work products or enhancement of existing applications and systems.
• Design, code, test, integrate and document software solutions.
• Participate in internal review of software components and systems.
• Collaborate with project managers and other professionals within Engineering.
• Follow established development practices and processes to maintain the configuration management of software products.

Qualifications

You Must Have

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience unless prohibited by local laws/regulations.
• Experience with C++, C and/or Java.
• The ability to obtain and maintain an 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.

We Prefer

• Knowledge of data structures and algorithms, systems software design, operating systems, architectures, software development life cycle and processes.
• Experience in software development, and with Windows and Linux Operating Systems, GIT, Jira, Jenkins, Perl, Bash, and Kornshell.
• Experience developing software in a team-based development environment, preferably Agile/SCRUM, DevOps and test automation.
• Strong problem-solving and communication skills, including ability to produce technical documentation, and the desire to learn new technologies and tools.
• Able to travel domestic and international.
• Demonstrated ability to work effectively with coworkers.
• Demonstrated ability to work with colleagues who represent multiple work and conflict resolution styles.

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.

Salary

107,500 USD - 204,500 USD

Benefits

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.

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.

Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement. 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.

Equal Opportunity

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.

Company

RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.