Senior Software Engineer – Core Systems, Libraries

RTX

. Architect and design core software components, libraries, and tooling aligned to avionics system requirements .

Posted 10/13/2026full-timeUnited StatesSenior💰 $86,800 - $165,200 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in architecting and developing safety-critical software components for avionics systems, with a strong focus on DO-178 certification processes and compliance. Proficient in modern C++ programming and object-oriented design principles, ensuring robust software lifecycle management.

Highest-signal resume keywords

DO-178 CertificationC++ DevelopmentSoftware Architecture DesignSafety-Critical SoftwareCustomer Engagement

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C++Software ArchitectureDO-178 CertificationHigh-Level RequirementsLow-Level RequirementsTest Case DevelopmentAutomated Test ProceduresVxWorksSoftware VerificationObject-Oriented Design

Soft Skills

Technical LeadershipCollaborationPeer ReviewStakeholder PresentationCommunication

Tools & Technologies

GitSubversionJIRAFlight Management SystemsMiddleware

Industry Keywords

AvionicsSafety-Critical EnvironmentCivil CertificationDAL-A DeliverablesRegulatory Compliance

Tech Stack

Tools & technologies

SubversionC++

About the role

Key responsibilities & impact

Architect and design 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
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 with customers and regulatory authorities
Conduct and contribute to peer reviews to ensure quality, consistency, and lifecycle compliance
Collaborate with engineering, program leadership, and customers to align technical solutions with program objectives
Work across the full software lifecycle to deliver robust, certifiable avionics solutions
Travel domestically and internationally as required, less than 10%

Requirements

What you’ll need

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
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 to stakeholders
Experience with C++ and VxWorks preferred
Experience writing High-Level and Low-Level Requirements preferred
Experience writing Test Cases and Automated Test Procedures preferred
Experience with Civil Certification DO-178 – DAL A preferred
Experience with Flight Management Systems, software, aircraft applications, or middleware preferred
Familiarity with revision control concepts and tools such as Git, Subversion, and JIRA preferred
Hands-on experience supporting DO-178 software development and certification activities preferred
U.S. citizenship required
Willingness and ability to travel domestically and internationally as required, less than 10%

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
Lifetime Income Strategy option
Tuition reimbursement program
Student Loan Repayment Program
Life insurance and disability coverage
Optional pet, home and auto, additional life and accident, critical illness, group legal, and identity theft protection insurance
Birth, adoption, and parental leave benefits
Carrot Health fertility and family-building benefit
Adoption Assistance
Autism Benefit
Employee Assistance Plan with 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
Relocation eligibility
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