Principal Software Engineer

Prattwhitney; Indianapolis (IN); On-site; USD 108,000 - 205,000; Full time

Benefits offered by this job

Medical

Dental

Vision

401(k) match

Flexible schedules

Employee Scholar Program

Parental leave

Paid time off

Job summary

RTX in Indianapolis is seeking an experienced software engineer for an onsite role requiring DoD security clearance. You will collaborate with software and systems engineers to design and implement complex integrations across the full software lifecycle, from concept to maintenance.

The ideal candidate has strong C++/C# and Python skills, Windows experience, and solid OOP fundamentals, with familiarity in RTOS environments and DoD standards.

Qualifications

• Requires STEM degree and typically 8+ years of relevant experience.
• Experience in software requirements, design, development, integration and test.
• Experience with C++, C#, Ada, Python, or related languages.
• Experience in Windows environments and OOP concepts.
• Experience with Git for source control and with DevOps/DevSecOps practices.

Responsibilities

• Provide solutions to complex software integration problems with end-user focus.
• Collaborate with software and systems engineers across lifecycle stages: concept to maintenance.
• Lead and mentor peers, participate in reviews and design/process improvements.
• Support both DoD and commercial programs from requirements through testing and maintenance.

Skills

C++

C#

Python

RTOS

Git

CI/CD

OOP

Security clearance

Education

Bachelor's degree in STEM

Tools

Azure DevOps

Jira

Git

Job description

Job Overview

Date Posted: 2026-08-24 Country: United States of America Location: US-IN-INDIANAPOLIS-206 ~ 3939 Priority Way S Dr ~ PRIORITY BLDG 6 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 At RTX, the world's 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. Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

Location and Role Type

This position will be 100% onsite in Indianapolis, IN. The position is classified as 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. Candidates will learn more about role type and current site status throughout the recruiting process. For onsite roles, commuting to and from the assigned site is the employee’s personal responsibility. This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA, an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.

What You Will Do

Use and provide creative solutions to complex technical system and software integration problems. Work closely with other software engineers and systems engineers to design ideal solutions with the end user and operational needs in mind. Support all aspects of a software development life cycle as members of a multi-disciplined team. This includes supporting new and legacy military and commercial programs from concept and requirements, to design, development, integration, test, and potentially subsequent maintenance tasking. Provide technical leadership through mentorship, providing technical assistance to others, participation in reviews, and participation in proposal, design, and process improvement.

Qualifications

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience unless prohibited by local laws/regulations.
• Experience in software requirements, design, development, integration, and test.
• Experience developing and testing software using C++, C#, Ada, Python, or closely related software languages.
• Experience developing software in a Windows environment.
• Experience with Object-Oriented Programming (OOP) concepts such as understanding classes, inheritance, polymorphism, and encapsulation.
• Experience with Git for source code management.
• Experience with DevOps and DevSecOps practices, including CI/CD pipelines and software development methodologies.
• Experience with software systems design, integration, and management.
• Experience with utilizing software debugging tools to troubleshoot software implementation and ensure integrity of the software products.
• The ability to obtain and maintain a U.S. government Secret issued security clearance is required.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Experience on embedded high-criticality Real-Time Operating Systems (RTOS) such as Green Hills Software (GHS) INTEGRITY or WindRiver VxWorks.
• Software/firmware and documentation development experience on safety critical programs, executed under processes prescribed in MIL-STD-882E, DO-178, DO-254, DO-330, DO-331, DO-332.
• Experience using software optimization techniques and timing analysis to ensure real-time operation and synchronization across software products.
• Experience with Ethernet and MIL-STD-1553 protocols and associated analysis tools (e.g., Wireshark and AltaView, respectively).
• Working knowledge or driver development experience in common computer hardware interface and data protocols such as TCP/IP, UDP, serial, USB and PCI.
• Experience with communications software libraries and development tools such as DDS, TSS, ZeroMQ/NetMQ.
• Experience with graphics software libraries and development tools including OpenGL, VAPS XT, GL Studio or SCADE.
• Experience developing requirements for software products.
• Understanding of computer architecture and computer hardware optimization techniques.
• Working knowledge of Software Configuration Management principles environments and tools.
• Working knowledge and experience in an Agile development environment using Azure DevOps, Jira, or equivalent toolsets.
• Parallel programming principles and processes for technical computing environments.
• Strong desire and ability to collaborate in a team environment.
• Strong writing and oral presentation skills.
• A proactive approach to identifying challenges and finding solutions collaboratively.
• Ownership of tasks and responsibilities, with a commitment to delivering quality work on time.
• Ability to self-organize and meet short-term and long-term deadlines.
• Able to work closely in a multi-discipline team daily.
• Strong Analytical skills.
• Comfort with change and flexibility to pivot when priorities or requirements evolve.

What We Offer

Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation. Relocation eligible.

• 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
• holidays

The salary range for this role is 107,500 USD - 204,500 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.

This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.

RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

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.

Privacy Policy and Terms: Click on this link to read the Policy and Terms 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, is headquartered in Arlington, Virginia.