Senior Software Engineer

Prattwhitney; Westford (MA); On-site; USD 87,000 - 165,000; Full time

Benefits offered by this job

Medical

Dental

Vision

Life insurance

401(k) match

Flexible schedules

Employee assistance program

Paid time off

Holidays

Job summary

RTX is seeking a software engineer for an on-site role in Westford, MA. You will develop software across languages (C++, Java, Typescript) and integrate systems in engineering labs. The position requires a Secret clearance and U.S.

citizenship, with a 1st shift on-site work arrangement. Typical qualifications include a STEM degree with 3+ years of experience and strong emphasis on scalable, efficient software.

Qualifications

• Typically requires a STEM degree and 3–5+ years of experience.
• Experience with Linux Java/C++ development focused on scalability and performance.
• U.S. citizenship and ability to obtain secret clearance are required.

Responsibilities

• Perform software development with a skilled software team.
• Support program efforts and proposal activities.
• Mentor and provide technical insight into new software components.

Skills

C++

Java

Typescript

Linux

Performance optimization

Kubernetes

Machine Learning concepts

GPU Programming

Education

BS in Software Engineering or related major

Tools

Kubernetes

Job description

Date Posted: 2026-09-29

Country: United States of America

Location: US-MA-WESTFORD-WFD7 ~ 7 Technology Park Dr ~ BLDG 7

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 Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1

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.

What You Will Do

• Perform software development with a highly skilled software team.
• Provide direct support of program efforts and proposal activities.
• Provide mentorship and technical insight into new software components.
• Develop software in multiple languages, including but not limited to C++, Java, Typescript.
• Integrate software into larger systems in engineering and test labs.

This 1st shift role will be 100% on-site and based in Westford, MA.

Qualifications You Must Have

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior work experience, or an Advanced Degree in a related field and a minimum of 3 years of prior work experience.
• Experience with Linux Java/C++ development with a focus on application scalability and performance.
• This 1st shift role will be 100% on-site and based in Westford, MA.
• The ability to obtain and maintain a U.S. government issued Secret security clearance post-start is preferred.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer

• BS degree in Software Engineering or a related major is HIGHLY PREFERRED.
• Algorithm development and/or implementation (imaging, navigation, communication, etc.)
• Familiarity with imaging systems, control systems, navigation, or ISR.
• BS degree in Software Engineering or a related major is HIGHLY PREFERRED.
• Experience with estimating software tasks for extended periods of time (i.e. longer than 12 months).
• Experience interacting with internal organizations and disciplines.
• Experience with Kubernetes.
• Experience with Machine Learning concepts.
• Experience with GPU Programming.
• Ability and desire to facilitate team growth and knowledge transfer.
• Communication, interpersonal, and decision-making skills.

This position is classified as: 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.

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
• 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.

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.