Senior Software Engineer - Core Systems & Libraries (Onsite)

Date Posted:

2026-07-15



Country:

United States of America



Location:

US-AL-HUNTSVILLE-382 ~ 420 Jan Davis Dr ~ DAVIS 382



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

Join the Collins Aerospace Core Systems & Libraries team and help build the software backbone that powers modern aircraft. 

We’re looking for a Senior Software Engineer who enjoys solving complex problems and delivering high-impact solutions in safety-critical environments. 

In this role, you will architect and develop core software components, libraries, and tools that enable scalable, certifiable avionics platforms. You’ll work across the full software lifecycle, partnering with cross-functional teams to deliver robust solutions aligned with civil and military certification standards. 

What You Will Do

• Develop the architecture and design of core software components, libraries, and tooling aligned to avionics system requirements 

  
  
  

• Drive technical direction and execution across development and verification activities for safety-critical software (DO-178) 

  
  
  

• Develop software requirements, decomposition, and traceability across complex systems 

  
  
  

• Develop and verify software using modern C++ and object-oriented design principles 

  
  
  

• Develop DO-178 certification artifacts, including DAL-A deliverables 

  
  
  

• Perform certification efforts, including engagement with customers and regulatory authorities 

  
  
  

• Conduct and contribute to peer reviews to ensure quality, consistency, and compliance across the lifecycle 

  
  
  

• Collaborate cross-functionally with engineering, program leadership, and customers to align technical solutions with program objectives 

  
  
  

• Willing and Able to travel as required (domestic and international <10%).

  
  
  

What You Will Learn

• Gain hands-on experience with cutting-edge and emerging technologies that are shaping the future of avionics and aerospace systems 

  
  
  

• Build end-to-end expertise across the full product lifecycle, from requirements and design through verification and delivery of safety-critical systems 

  
  
  

• Develop a deep understanding of software certification (DO-178) and how world-class avionics products meet rigorous regulatory standards 

  
  
  

• Learn how to design, scale, and sustain software product lines that support a wide range of platforms and global customers 

  
  
  

Qualifications You Must Have

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience

  
  
  

• U.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contract. 

  
  
  

• Proven experience designing and developing software architecture, libraries, or platform-level components within an aerospace or safety-critical environment 

  
  
  

• Demonstrated ability to lead technical execution of tasks, including customer engagement and presenting stakeholders 

  
  
  

• Hands-on experience supporting Safety Critical Airborne software development and certification activities (e.g., requirements, verification, or certification artifacts) 

  
  
  

Qualifications We Prefer

• Hands-on experience supporting DO-178 software development and certification activities (e.g., requirements, verification, or certification artifacts) 

  
  
  

• Experience with C++ and VxWorks. 

  
  
  

• Experience writing High-Level and Low-Level Requirements. 

  
  
  

• Experience writing Test Cases and Automated Test Procedures. 

  
  
  

• Experience with Civil Certification DO-178 – DAL A preferred. 

  
  
  

• Experience with design and development of Flight Management Systems, Software, Aircraft Applications or Middleware. 

  
  
  

• Familiar with revision control concepts and tools (e.g. GIT, Subversion, JIRA). 

  
  
  

Learn More & Apply Now!

Avionics delivers advanced cockpit displays, vision systems, and comprehensive digital solutions for global government, commercial and business aviation customers. We provide connectivity and managed data services to ensure safety and seamless communication for passengers, crews, and militaries, from aircraft and airports to air traffic management. Join us in creating solutions that connect the world, one flight at a time. Start your application today.

*Please ensure the role type (defined below) is appropriate for your needs before applying to 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

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 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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