Senior Software Engineer - Core Systems & Libraries (Hybrid)

Job ID: 01881948Posted: Posted TodayStart Date: 2026-10-13Location: US-AL-HUNTSVILLE-382 ~ 420 Jan Davis Dr ~ DAVIS 382; US-IA-CEDAR RAPIDS-124 ~ 400 Collins Rd NE ~ BLDG 124Country: United States of AmericaTime Type: Full timeDate Posted:2026-10-13 Country:United States of America Location:US-AL-HUNTSVILLE-382 ~ 420 Jan Davis Dr ~ DAVIS 382 Position Role Type:Hybrid U.S. Citizen, U.S. Person, or Immigration Status Requirements:U.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contract. Security Clearance Type: None/Not Required Security Clearance Status: Not RequiredAt 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. Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense. 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. This is a unique opportunity to influence system-level architecture, drive open-architecture innovation, and help shape the technologies defining the future of aerospace. This role will have a hybrid schedule in Cedar Rapids, Iowa or Huntsville, AL. What You Will DoDevelop 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 LearnGain 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 oran Advanced Degree in a related field and minimum 3 years of experience.Experience designing and developing software architecture, libraries, or platform-level components within an aerospace or safety-critical environment.Experience leading technical execution of tasks, including customer engagement and presenting stakeholders. Qualifications We PreferExperience 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). Hands-on experience supporting DO-178 software development and certification activities (e.g., requirements, verification, or certification artifacts) What We OfferMedical, 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 Carrot Health to hormonal health, fertility, and family buildingAdoption 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!  This role is eligible for relocation. 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. Hybrid: Employees who are working in Hybrid roles will work regularly both onsite and offsite. Ratio of time working onsite will be determined in partnership with your leader. 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. Privacy Policy and Terms:Click on this link to read the Policy and Terms