Principal Software Engineer (Onsite)

Location: US-CT-WINDSOR LOCKS-B1A ~ 1 Hamilton Rd ~ BLDG 1A

Time Type: Full time

Job Description

Date Posted:

2026-04-09

Country:

United States of America

Location:

US-CT-WINDSOR LOCKS-B1A ~ 1 Hamilton Rd ~ BLDG 1A

Position Role Type:

Onsite

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

This job requires a U.S. Person. A U.S. Person is a lawful permanent resident as defined in 8 U.S.C. 1101(a)(20) or who is a protected individual as defined by 8 U.S.C. 1324b(a)(3). U.S. citizens, U.S. nationals, U.S. permanent residents, or individuals granted refugee or asylee status in the U.S. are considered U.S. persons. For a complete definition of “U.S. Person” go here. https://www.ecfr.gov/current/title-22/chapter-I/subchapter-M/part-120/subpart-C/section-120.62

Security Clearance Type:

None/Not Required

Security Clearance Status:

Not Required

Do you like to fly?  Would you like to better understand how the embedded software controls the engine?  Would you like to understand the rigorous certification requirements that must be met before an aircraft takes flight?  As a Principal Software Engineer, you will be on a mission to develop, test, and prove compliance to the certification authorities that our products are safe, reliable, and airworthy!

We are seeking a highly skilled Principal Embedded Software Engineer to join our dynamic team. In this role, you will design, develop, and verify real-time embedded software for cutting-edge flight-critical aviation applications. Your work will shape the future of aerospace technology through innovative software solutions. As a key technical leader, you will drive software architecture creation, lead verification activities in compliance with DO-178B/C, and work in collaboration with multidisciplinary teams to ensure the delivery of high-quality, reliable software. This is an opportunity to contribute to state-of-the-art aerospace applications while mentoring and guiding other engineers in best practices.

Ideally, this will be a fully onsite role based in Windsor Locks, CT. Will consider candidates for a hybrid position (combination of onsite and remote work - weekly onsite presence will be required).

What You Will Do

• Requirements Engineering, Implementation, and Verification

• Translate customer requirements into actionable software requirements.

• Design and implement software solutions that meet performance, safety, and reliability standards.

• Conduct low-level verification activities to ensure compliance with DO-178B/C.

• Review software design and code to confirm alignment with software requirements.

• Generate, execute, and review test scripts and data for software verification.

• Create documentation to support aerospace certification processes.

• Propose enhancements to improve the cost, quality, and efficiency of software products.

• Develop and execute build procedures for hardware and software integration.

• Establish and maintain software configuration management and quality standards.

• Mentor and train software engineers in tools, processes, and industry best practices.

Qualifications You Must Have

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) unless prohibited by local laws/regulations and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience.

• Embedded Software Engineering experinece.

Qualifications We Prefer

• Degree in Computer Engineering, Electrical Engineering, Software Engineering, or a related technical field.

• Experience with aerospace or other safety-critical embedded systems.

• Expertise in designing and developing embedded software architectures for real-time systems.

• Hands-on experience with DO-178B/C processes, including software verification and compliance.

• Proven ability to lead projects across functional teams and geographic locations.

• Proficiency in software debugging, instrumentation, and performance analysis.

• Programming experience in C, Assembly, and/or Python.

• Familiarity with tools such as logic analyzers and other lab test equipment.

• Experience with software verification testing.

What We Offer

Some of our competitive benefits package includes:   

• 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, fertility, and family planning  

• Adoption Assistance           

• Autism Benefit  

• Employee Assistance Plan, including up to 10 free counseling sessions  

• Healthy You Incentives, wellness rewards program 

• Doctor on Demand, virtual doctor visits  

• Bright Horizons, child and elder care services 

• Teladoc Medical Experts, second opinion program  

•  And more!  

Eligible for relocation

We make modern flight possible for millions of travelers and our military every second.  Our major product lines are on-board virtually every aircraft flying. Be it keeping passengers safe with our emergency power generation systems or creating a positive in flight experience through reliable cabin pressure controls and quieter engines, Power & Controls focuses on delivering a best-in-class experience to our customers. We hire the top people in the industry. Their ideas drive our performance, and their integrity keeps our customers happy. Join us as we take flight! 

Role type definition:

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. 

At Collins, the paths we pave together lead to limitless possibility. And the bonds we form – with our customers and with each other -- propel us all higher, again and again.  

Apply now and be part of the team that’s redefining aerospace, every day.  

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 107,500 USD - 204,500 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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