Senior Principal Software Engineer

About this role

Date Posted: 2026-08-12

 Country: United States of America

 Location: US-MN-ST LOUIS PARK-5775 ~ 5775 Wayzata Blvd ~ WAYZATA, Ste 630

 Position Role Type: Hybrid

 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: Top Secret

 Security Clearance Status: Active and existing security clearance required on day 1

At 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 succes

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