Principal Software Engineer – Core Services and Libraries

RTX

. Lead architecture and design of core software components, libraries, and tooling aligned to avionics system requirements .

Posted 9/30/2026full-timeUnited StatesLead💰 $107,500 - $204,500 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in software architecture and design for avionics systems, with a strong focus on DO-178 certification processes and safety-critical software development. Proven ability to lead cross-functional teams and manage complex software requirements and verification activities.

Highest-signal resume keywords

DO-178 CertificationC++ DevelopmentSoftware Architecture DesignCross-Functional Team LeadershipSafety-Critical Software Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software Requirements ManagementObject-Oriented Design PrinciplesTest Case DevelopmentAutomated Test ProceduresHigh-Level Requirements WritingLow-Level Requirements WritingFlight Management SystemsMiddleware DevelopmentVxWorksSafety-Critical Environment Experience

Soft Skills

Technical LeadershipCustomer EngagementPresentation SkillsCollaboration

Tools & Technologies

GITSubversionJIRA

Certifications & Qualifications

STEM DegreeCivil Certification DO-178 DAL A

Industry Keywords

AerospaceAvionicsSafety-Critical SystemsRegulatory ComplianceTechnical Direction

Tech Stack

Tools & technologies

SubversionC++

About the role

Key responsibilities & impact

Lead 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 DO-178 software
Define and manage software requirements, decomposition, and traceability across complex systems
Develop and verify software using modern C++ and object-oriented design principles
Own and produce DO-178 certification artifacts, including DAL-A deliverables
Lead and support certification efforts with customers and regulatory authorities
Conduct and contribute to peer reviews to ensure quality, consistency, and compliance
Collaborate with engineering, program leadership, and customers to align technical solutions with program objectives

Requirements

What you’ll need

STEM degree and minimum 8 years of relevant experience, or an advanced degree in a related field and minimum 5 years of experience
Proven experience designing and developing software architecture, libraries, or platform-level components in an aerospace or safety-critical environment
Ability to lead technical execution of projects, including customer engagement and presentations to senior stakeholders
Experience working across cross-functional engineering and program teams to deliver complex, integrated solutions
U.S. citizenship required
Willingness and ability to travel domestically and internationally as required, less than 10%
Hands-on experience with DO-178 software development and certification activities preferred
Experience with C++ and VxWorks preferred
Experience writing High-Level and Low-Level Requirements preferred
Experience writing Test Cases and Automated Test Procedures preferred
Civil Certification DO-178 DAL A experience preferred
Experience with Flight Management Systems, software, aircraft applications, or middleware preferred
Familiarity with revision control tools such as GIT, Subversion, and JIRA preferred

Benefits

Comp & perks

Medical, dental, and vision insurance
Three weeks of vacation for newly hired employees
401(k) plan with 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 pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, and ID theft protection
Birth, adoption, and 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
Flexible work schedules
Employee Scholar Program
Paid time off and holidays
Annual short-term and/or long-term incentive compensation programs may be available; payments are not guaranteed