Software Engineer I - C, C++ (Onsite)

Date Posted:

2026-01-16

Country:

United States of America

Location:

US-MA-CAMBRIDGE-BBN04 ~ 10 & 50 Moulton St ~ MOULTON B4

Position Role Type:

Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements:

The ability to obtain and maintain a U.S. government issued security clearance is required.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Security Clearance:

DoD Clearance: Secret

RTX Corporation 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 Systems, Pratt & Whitney, and Raytheon. Its 185,000 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, VA.

The following position is to join our RTX Corporate BBN team:

Who We Are

RTX BBN Technologies is one of RTX’s premier research and development centers. Our research portfolio combines the best technologies to deliver innovative, custom solutions with real-world benefit.

At RTX BBN Technologies, we invent new science by applying radical cross-disciplinary techniques to prototype systems in order to prove concept viability. This is especially evident in our Physical Systems and Sciences group, located in Cambridge, Massachusetts, where scientists and engineers anticipate the future in both very large and very small-scale scientific systems that often need to survive challenging operational environments.

What You Will Do & Learn

We are seeking qualified and eager new or recent graduates to become an integral part of this work. You will join a project team designing, analyzing, and prototyping innovative multi-domain system architectures.

You will contribute to an environment focused on embedded software generation, testing, and research with a focus in C, C++, and Linux. Examples of the challenging problems this team has worked to resolve include:

• Developing and implementing sophisticated detection, classification, localization, and tracking (DCLT) algorithms against state-of-the-art threats in high-noise environments

• Designing and implementing complex software to optimize sensor system performance

• Designing and implementing software for the guidance and control of autonomous vehicles

• Supporting real time evaluation of designs in realistic mission scenarios and operational analysis

• Optimizing algorithm designs for highest performance

Qualifications You Must Have

• A Bachelor's degree in an applicable discipline (i.e. Computer Science, Computer Engineering, Electrical Engineering, or related field) and 12 months or less of relevant professional work experience (excluding internships)

• The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance 

• Classroom, project, or prior internship experience in software design, simulation, analysis, and/or implementation

• Classroom, project, or prior internship experience programming in one or more modern languages and environments (i.e. C, C++, Linux, etc.)

Qualifications We Prefer

• Deep and driving curiosity

• Experience with Python, Bash, Google FlatBuffers, git, Valgrind, and Linux debugging tools, such as gdb

• Experience with multithreaded applications, inter-process communication, and resource sharing

What We Offer: 

Some of our competitive benefits packages include: 

• Medical, dental, and vision insurance   

• Three weeks of vacation for newly hired employees 

• Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option   

• Tuition reimbursement program  

• Student Loan Repayment Program   

• Life insurance and disability coverage   

• Optional coverages you can buy: pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection  

• Birth, adoption, parental leave benefits  

• Ovia Health, fertili