Senior C/C++ Software Development Engineer

Location US-MA-TEWKSBURY-TB3 ~ 50 Apple Hill Dr ~ CONCORD BLDG, Tewksbury Tb3 300 Concord Job Details Date Posted: 2026-07-14 Country: United States of America Position Role Type: Onsite Security Clearance 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. Job Summary We are seeking a skilled and detail-oriented Senior Software Engineer to develop complex systems in C/C++ as part of our Patriot Software Team in Tewksbury, Massachusetts. 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. This position works in an SCIF environment with an optional 9/80 schedule to accommodate work/life balance practices. Responsibilities Design, develop, and maintain software applications using C and C++ for complex real-time 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. Light travel and off-hours testing (2nd or 3rd shift) may occasionally be required. This position requires exclusive onsite presence. Qualifications (Must Have) Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience unless prohibited by local laws/regulations. Experience in developing complex systems and applications using C/C++. Experience in embedded systems, real-time systems, or large-scale applications. Experience in a Unix/Linux operating system. Qualifications (Preferred) Understanding of data structures, algorithms, and software design principles, particularly in high-concurrency and distributed systems. Experience with multithreading, memory management, and performance optimization in complex environments. 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.). Benefits Salary range for this role is 86,800 USD - 165,200 USD. 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. Relocation Relocation Eligible – Relocation assistance available. EEO Statement 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. #J-18808-Ljbffr