Sr Principal Software Engineer -Core Systems & Libraries (Onsite)

Position OverviewDesign the Foundation of Next-Generation Avionics. Join the growing Collins Aerospace Core Systems and Libraries team and play a key role in shaping the software foundation that powers modern aircraft. We are seeking a Senior Principal Software Engineer who thrives on solving complex technical challenges and driving high‑impact solutions across safety‑critical systems.What You Will DoLead the architecture and design of core software components, libraries, and tooling aligned to avionics system requirementsDrive technical direction and execution across development and verification activities for safety‑critical software (DO‑178)Define and manage software requirements, decomposition, and traceability across complex systemsDevelop and verify software using modern C++ and object‑oriented design principlesOwn and produce DO‑178 certification artifacts, including DAL‑A deliverablesLead and support certification efforts, including engagement with customers and regulatory authoritiesConduct and contribute to peer reviews to ensure quality, consistency, and compliance across the lifecycleCollaborate cross‑functionally with engineering, program leadership, and customers to align technical solutions with program objectivesWilling and able to travel as required (domestic and international What You Will LearnGain hands‑on experience with cutting‑edge and emerging technologies that are shaping the future of avionics and aerospace systemsBuild end‑to‑end expertise across the full product lifecycle, from requirements and design through verification and delivery of safety‑critical systemsDevelop a deep understanding of software certification (DO‑178) and how world‑class avionics products meet rigorous regulatory standardsLearn how to design, scale, and sustain software product lines that support a wide range of platforms and global customersYou Must HaveTypically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 10 years prior relevant experience or an Advanced Degree in a related field and minimum 7 years of experienceU.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contractProven experience designing and developing software architecture, libraries, or platform‑level components within an aerospace or safety‑critical environmentDemonstrated ability to lead technical execution of projects, including customer engagement and presenting to senior stakeholdersHands‑on experience supporting DO‑178 software development and certification activities (e.g., requirements, verification, or certification artifacts)Experience working across cross‑functional engineering and program teams to deliver complex, integrated solutionsPreferred QualificationsExperience with C++ and VxWorksExperience writing High‑Level and Low‑Level RequirementsExperience writing Test Cases and Automated Test ProceduresExperience with Civil Certification DO‑178 – DAL A preferredExperience with design and development of Flight Management Systems, Software, Aircraft Applications or MiddlewareFamiliar with revision control concepts and tools (e.g. GIT, Subversion, JIRA)BenefitsMedical, dental, and vision insuranceThree weeks of vacation for newly hired employeesGenerous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy optionTuition reimbursement programStudent Loan Repayment ProgramLife insurance and disability coverageOptional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protectionBirth, adoption, parental leave benefits Ovia Health, fertility, and family planning Adoption Assistance Autism Benefit Employee Assistance Plan, including up to 10 free counseling sessionsHealthy 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!Salary Range132,400 USD - 251,600 USD.EEO StatementRTX 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 #J-18808-Ljbffr