Entry Level Software Developer Jobs in Allen, TX

Date Posted: 2026-09-08 Country: United States of America Location: US-TX-MCKINNEY-513WC ~ 2501 W University Dr ~ WING C BLDG 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

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.

The Advanced Products and Solutions (APS) business unit focuses on developing state-of-the-art Electro-Optical/Infrared (EO/IR) technologies and systems for a variety of mission-critical applications. We are at the forefront of innovation, providing advanced solutions that enhance situational awareness and operational effectiveness. We are seeking a highly motivated Software Engineer I with experience in C++ and Linux to join our team in the Advanced Products and Solutions (APS) business unit, supporting EO/IR programs. In this role, you will contribute to the design, development, testing, and integration of software solutions that power next-generation EO/IR systems for critical aerospace and defense applications. This is an entry-level role ideal for those passionate about software engineering and eager to grow their skills in a challenging and rewarding environment This position is an onsite role at our McKinney, TX facility.

• Design, develop, and debug software in C++ for real-time systems running on Linux platforms.
• Collaborate with cross-functional teams, including systems engineering, electrical engineering and test, to ensure seamless integration of software.
• Implement and optimize software algorithms to meet performance, reliability, and scalability requirements of mission-critical applications.
• Perform integration testing hardware, ensuring seamless operation and compliance with system requirements.
• Write and maintain software documentation, including design specifications, technical reports, and user manuals.
• Work onsite at McKinney, TX Support Formal Qualification Test events Conduct unit testing and software integration testing to verify functionality and compliance with system requirements.
• Troubleshoot and resolve software issues, ensuring timely delivery of high-quality solutions.
• Adhere to industry best practices, coding standards, and security guidelines specific to aerospace and defense applications.
• Participate in code reviews, providing constructive feedback to peers and ensuring adherence to program standards.

Able to obtain and maintain a Secret U.S. security clearance. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and less than 2 years of relevant prior experience
• Experience in C++ programming and familiarity with object-oriented design principles.
• Experience working with Linux operating systems, including shell scripting and command-line tools.
• Experience working effectively in a collaborative, team-oriented environment.

• Experience with hardware-software integration and debugging.
• Understanding of pipeline implementation and utilization, including Static Code Analysis, Automated Build, and Automated Test techniques using continuous integration/continuous delivery with Test-Driven Development approach.
• Ability to manage multiple priorities.
• Effective verbal and written communication skills.
• Ability to fly on flight test aircraft in support of system platform testing.

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

• 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.