Senior Software Engineer

Job Description

Date Posted:

2026-06-16

Country:

United States of America

Location:

US-MA-CAMBRIDGE-BBN01 ~ 10 & 50 Moulton St ~ MOULTON B2

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:

Active and existing security clearance required on day 1

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.

RTX BBN Technologies is one of RTX’s premier research and development centers providing advanced systems and services for commercial, military and government customers worldwide. Our diverse research portfolio combines the best technologies to deliver innovative, custom solutions with real-world benefit.

The following position is to join our BBN Technologies team:

Role Overview:

We are seeking an experienced SW engineer to join our Physical Sciences and Systems group in Cambridge, Massachusetts. 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. Our world-class team works with a broad range of Government agencies to solve problems that are both technically challenging and have a real operational impact.

What You Will Do:

Examples of the types of challenging problems we work on 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
The candidate should be able to plan/direct/coordinate tasks or small projects involving multiple individuals. The candidate will participate in business development by contributing to proposals and white papers, and making effective presentations to our customers. This position may require some amount of overnight travel to support limited off-site testing.

Qualifications You Must Have:

Typically requires a bachelor’s degree in an applicable discipline (i.e., Computer Science, Computer Engineering, Electrical Engineering, or related field) and 5 years of relevant professional work experience, or a master’s degree in the disciplines above plus 3 years’ experience, or a PhD
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.
Prior experience in software design, simulation, analysis, and implementation
Prior experience programming in C++ or another modern object-oriented language in the Linux development environment

Qualifications We Prefer:

Experience with scripting languages such as Python and Bash
Experience with Linux development tools such as git, Valgrind, and gdb
Exposure to development libraries like Google FlatBuffers, Armadillo, and REST API
Experience with multithreaded applications, inter-process communication, and resource sharing
Development experience in systems with real-time processing requirements

Learn More & Apply Now

Work Location: Onsite - Cambridge, MA

Please consider the following role type definition as you apply for this role:

Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.

The salary range for this role is 86,800 USD - 165,200 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.

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. 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.

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.

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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