Entry Level Firmware Engineer Jobs in Frisco, TX

Date Posted: 2026-08-18 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 At Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. We bring 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. Our team solves tough, meaningful problems that create a safer, more secure world. The Software organization develops software applications, including integration and test on missiles, launchers, radars, naval systems, fire control and other complex systems. Our precision software and firmware integrate operating systems, device drivers, networking, and control software to bring together sensor, guidance, and flight control processing features to complete the mission. The Software org is made up of several Centers located across the country, responsible for all aspects of the software development lifecycle. Our 4000+ software engineers design, develop, and build innovative solutions for our customers. Join our fast-paced agile teams on the leading edge of technology. 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).
• 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: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.

• 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

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.

The salary range for this role is 57,200 USD - 108,800 USD.

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. 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.

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 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 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.