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

Date Posted:2026-06-18 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: 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 RequiredDesign the Foundation of Next-Generation AvionicsJoin 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.In this role, you will lead the architecture and development of 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 high-quality solutions aligned with civil and military certification standards.This is a unique opportunity to influence system-level design, advance open architecture initiatives, and contribute to technologies that define the future of aerospace.Location: Onsite in Huntsville, ALWhat 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 customers  Qualifications You Must Have Typically 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/contract.Proven 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 solutionsQualifications 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).What We Offer Medical, 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 benefitsOvia Health, fertility, and family planningAdoption Assistance         Autism BenefitEmployee Assistance Plan, including up to 10 free counseling sessionsHealthy You Incentives, wellness rewards programDoctor on Demand, virtual doctor visitsBright Horizons, child and elder care servicesTeladoc Medical Experts, second opinion programAnd more! 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