Senior Principal Software Engineer
Confirmed on the employer's own hiring board on Sep 26, 2026. First seen by Alion on Aug 19, 2026.
Date Posted:
2026-08-19Country:
United States of AmericaLocation:
US-MN-ST LOUIS PARK-5775 ~ 5775 Wayzata Blvd ~ WAYZATA, Ste 630Position Role Type:
HybridU.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 clearanceSecurity Clearance Type:
DoD Clearance: Top SecretSecurity Clearance Status:
Active and existing security clearance required on day 1At RTX, the world 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. Join us and help shape the future of aerospace and defense.
For over 70 years, RTX BBN Technologies (BBN) has solved challenging problems through research, exploration, development, and prototyping. Our Intelligent Software & Systems department is seeking qualified applicants to work on forward looking and projects in the areas of distributed systems, artificial intelligence, cyber security, information management, and virtual technologies.
Role Overview
We are looking for experienced, creative, and highly motivated Sr. Principal Software Engineer who can hit the ground running with development tasks, interact with current customers, contribute to one or more project teams, and contribute to BBN’s growth of current and new research areas. As senior member of the team, responsibilities will also include development and presentation of reports documenting design, test and evaluation and technical results.
What You Will Do
Develop and test software using Java and Python.
Lead complex software development efforts and technical solutions.
Collaborate with engineers, scientists, customers, and cross-functional teams.
Support customer engagements, demonstrations, and technical evaluations.
Develop technical documentation and present project results.
Estimate development tasks and support long-term project planning.
Contribute to new and emerging BBN research areas.
Qualifications You Must Have
Typically requires a Bachelor’s in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 10 years of prior software development experience or an Advanced Degree in a related field and minimum 7 years experience.
10+ years of Java development
10+ years of Python experience
Experience interacting with customers, suppliers, and/or other organizations / disciplines.
An active and transferable U.S. government issued security clearance is required prior to start date.
Qualifications We Prefer
Ability to lead complex development efforts
Experience with estimating software tasks for extended periods of time (i.e. longer than 12 months).
Android development experience a plus
Network programming (e.g., sockets) or computer networking experience a plus
JavaScript experience a plus
Experience with the Team Awareness Kit (TAK) is a plus
AI/ML development skills are a plus
What We Offer
Whether you’re just starting out on your career journey or are an experienced professional, we offer a robust total rewards package with compensation; healthcare, wellness, retirement, and work/life benefits; career development and recognition programs. Some of the benefits we offer include parental (including paternal) leave, flexible work schedules, achievement awards, educational assistance and child/adult backup care.
To help you achieve your goals, BBN will provide
A strong leadership team well-versed in government R&D
A collaborative and collegial environment to push state-of-the-art research
A diverse and technically competent pool of research scientists who are willing to mentor, listen, and help you refine your research vision and goals
Business development, programmatic, contracting, finance, and HR support
Learn More & Apply Now!
Hybrid assignment: On-Site work at customer location. Additional travel to business locations may be required. Relocation Assistance available
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 132,400 USD - 251,600 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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