Principal Software C/C++ Engineer
Listed on 2026-06-26
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Software Development
Software Engineer, C++ Developer, Unix/Linux, DevOps
Senior Software Engineer – Marlborough, Massachusetts
LocationMarlborough, Massachusetts (US-MA-MARLBOROUGH)
Job TypeOnsite.
Clearance RequirementsU.S. citizenship required. Candidates must hold or be able to obtain a U.S. Department of Defense Secret clearance (interim clearance permitted) prior to start date.
Responsibilities- Assist and participate in the requirements, design, development, and testing of real‑time embedded software, application software, and tools; develop new work products or enhance existing applications and systems.
- Design, code, test, integrate, and document software solutions.
- Participate in internal reviews of software components and systems.
- Collaborate with project managers and other professionals within Engineering.
- Follow established development practices and processes to maintain configuration management of software products.
- Degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of relevant experience, where not prohibited by local law.
- Experience with C++, C, and/or Java.
- Ability to obtain and maintain an active U.S. government issued interim Secret security clearance prior to the start date; U.S. citizenship required.
- Knowledge of data structures and algorithms, systems software design, operating systems, architecture, and software development life cycle and processes.
- Experience in software development with Windows and Linux operating systems, GIT, Jira, Jenkins, Perl, Bash, and Korn Shell.
- Experience developing software in a team‑based environment, preferably Agile/SCRUM, Dev Ops and test automation.
- Strong problem‑solving and communication skills, ability to produce technical documentation, and desire to learn new technologies and tools.
- Ready to travel domestically and internationally.
- Demonstrated ability to work effectively with coworkers and with colleagues who represent multiple work styles and conflict resolution approaches.
- Values-driven culture focused on Safety, Trust, Respect, Accountability, Collaboration, and Innovation.
- Relocation eligible.
Salary range: $107,500 – $204,500 USD, based on experience, role, and location.
Employee Benefits (if applicable)Eligible benefits may include medical, dental, vision, life insurance, short‑term and 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 depend on the business unit and collective bargaining agreements.
EEO StatementRTX 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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