Senior Software Engineer - Core Systems & Libraries (Hybrid)

Prattwhitney; Huntsville (AL); Hybrid; USD 87,000 - 165,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks of vacation

Generous 401(k) with matching

Tuition reimbursement

Student Loan Repayment Program

Life insurance and disability coverage

Family benefits and parental leave

Job summary

Collins Aerospace is seeking a Senior Software Engineer to architect and develop core software components and libraries for avionics platforms. The role offers a hybrid schedule in Cedar Rapids, IA or Huntsville, AL, with DO-178 certification focus and customer-facing responsibilities.

You will drive technical direction, develop certification artifacts, and collaborate across engineering, program leadership, and customers to deliver robust, certifiable software solutions.

Qualifications

• Degree in Science, Technology, Engineering or Mathematics (STEM) with 5+ years of experience or an advanced degree with 3+ years.
• Experience designing software architectures or platform‑level components in aerospace or safety‑critical domains.
• Proven ability to lead technical execution and engage customers.

Responsibilities

• Architect and develop core software components, libraries, and tooling for avionics systems.
• Drive technical direction and verify safety‑critical software (DO-178) activities.
• Create software requirements, decomposition, and traceability across complex systems.
• Develop and verify software using modern C++ and OO design.
• Produce DO‑178 certification artifacts, including DAL A artifacts.
• Support certification efforts with customers and regulators.
• Lead peer reviews to ensure quality and compliance across lifecycles.
• Collaborate with engineering, leadership, and customers to align solutions.

Skills

C++

VxWorks

DO-178

Customer engagement

Safety-critical

Education

Bachelor's degree in STEM or related field

Tools

GIT

Subversion

JIRA

Job description

Date 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 Required

At 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 Do

• Develop 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 Learn

• Gain 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 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 stakeholders.

Qualifications We Prefer

• Experience 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 Offer

• Medical, 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 building
• 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 And more!

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.

This role is eligible for relocation.

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.

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.

RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses