Software Engineering Intern (Summer 2027)

Prattwhitney; Fullerton (CA); On-site; USD 42,000 - 88,000; Full time

Benefits offered by this job

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

Job summary

RTX invites aspiring software engineers to join a hands-on internship in Fullerton, CA, working on radar and command-and-control software. You will collaborate with experienced engineers across backend, data processing, and front-end areas while building real applications for demanding environments.

You will develop practical skills in software design, testing, and delivery, gaining exposure to Git, Linux, and CI/CD practices, with mentorship and structured feedback throughout the program.

Qualifications

• Must be pursuing a Bachelor’s or Advanced degree in an applicable discipline and actively enrolled through completion of the internship / co-op session.
• Must have a minimum of 60 hours of credit by the start of the internship / co-op session.
• Experience writing software in at least one language, such as C, C++, Java, Python, or TypeScript.
• Experience gained through coursework, research, personal projects, or previous internships qualifies.

Responsibilities

• Build useful software: Design, code, test, integrate, and document new capabilities and improvements to existing applications.
• Connect data to decisions: Contribute to software that processes information, connects services, or presents complex data through web interfaces and visualizations.
• Solve a defined engineering challenge: Translate requirements into an implementation, explore technical tradeoffs, and deliver work with clear scope and expectations.
• Collaborate across disciplines: Work with software and systems engineers to understand how your contributions fit into the larger system.
• Learn through feedback: Participate in design discussions, code reviews, and demonstrations to strengthen your engineering judgment and communication skills.
• Develop professional engineering habits: Use version control, automated testing, debugging, and established development processes to produce reliable, maintainable software.

Skills

C/C++

Java

Python

TypeScript

Git

Linux

Automated testing

CI/CD

Education

Bachelor’s or Advanced degree (enrolled)

Tools

Git

Linux

Automated testing

CI/CD

Job description

Date Posted: 2026-10-12 Country: United States of America Location: US-CA-FULLERTON-675 ~ 1801 Hughes Dr ~ BLDG 675 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 Required

Are you ready to explore the world of aerospace and defense? Do you want to learn from and collaborate with some of the greatest minds in the industry? At RTX, our internships, co-ops and full-time careers provide an exceptional foundation to work on complex problems, advance your skills and create a safer, more connected world. Discover opportunities to make a difference at RTX.

What You Will Do

Help build software that turns complex sensor data into information people can understand and act on. Our teams develop software for radar and command-and-control systems, with opportunities spanning backend services, data processing, and full-stack web applications. As a Software Engineering Intern, you will work alongside experienced engineers to solve practical problems and contribute to software used in demanding environments. Depending on your assigned project, you may develop a service, build an interactive interface, improve system performance, or automate testing.

• Build useful software: Design, code, test, integrate, and document new capabilities and improvements to existing applications.
• Connect data to decisions: Contribute to software that processes information, connects services, or presents complex data through web interfaces and visualizations.
• Solve a defined engineering challenge: Translate requirements into an implementation, explore technical tradeoffs, and deliver work with clear scope and expectations.
• Collaborate across disciplines: Work with software and systems engineers to understand how your contributions fit into the larger system.
• Learn through feedback: Participate in design discussions, code reviews, and demonstrations to strengthen your engineering judgment and communication skills.
• Develop professional engineering habits: Use version control, automated testing, debugging, and established development processes to produce reliable, maintainable software.

U.S. citizenship is required.

What You Will Learn

Modern software tools and practices: Gain hands-on experience with development tools, automated testing, and workflows used to build reliable software.

How complex systems fit together: Learn how software architecture connects sensors, backend services, and user interfaces in radar and command-and-control systems.

Engineering tradeoffs: Understand how teams balance performance, reliability, security, and maintainability—and how those decisions support broader technical strategy.

Emerging technologies: Explore advances in software development, radar, and command-and-control systems, and evaluate how they could improve your project.

Qualifications

You Must Have

• Must be pursuing a Bachelor’s or Advanced degree in an applicable discipline and actively ++enrolled through completion of the internship / co-op session.
• Must have a minimum of 60 hours of credit by the start of the internship / co-op session.
• Experience writing software in at least one language, such as C, C++, Java, Python, or TypeScript.
• Experience gained through coursework, research, personal projects, or previous internships qualifies.

Qualifications We Prefer

We welcome students with different technical interests and backgrounds.

• Experience in one or more of the following areas is helpful: Software design fundamentals, including object-oriented programming, data structures, and algorithms.
• Web application development, including user interfaces, backend services, REST APIs, or databases.
• Systems programming, concurrent programming, networking, or applications that process streaming data.
• Data visualization, statistical or numerical methods, or an interest in sensor and radar applications.
• Development tools and practices such as Git, Linux, automated testing, or continuous integration.
• Projects that demonstrate curiosity, initiative, and the ability to turn an idea into working software.
• Clear communication, effective teamwork, and a willingness to ask questions, learn from feedback, and work through unfamiliar problems.

What We Offer

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

Relocation Eligible.

Please consider the following role type definition as you apply for this role. 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. 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.

The salary range for this role is 42,000 USD - 88,000 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.

• 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

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: 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.