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RTX
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October 2, 2026
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Software Test Engineer I

Tucson, AZ
Full-time
Onsite
$57K/yr - $109K/yr
Entry Level
RTX is an aerospace and defense company developing technologies for a safer, more connected world. The Software Test Engineer I will develop, integrate, troubleshoot, and optimize software applications and automated test environments for mission-critical defense systems, collaborating with multidisciplinary engineering teams and specialized hardware.
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Responsibilities

  • Design, code, and integrate object-oriented software applications and test software targeting Windows operating platforms
  • Develop and derive system-level software requirements, operational specifications, and architectural designs
  • Troubleshoot, debug, and optimize software applications to ensure rigorous test accuracy, repeatability, and reliability
  • Collaborate closely with systems, electrical, and mechanical engineers to integrate software test tools with specialized hardware instrumentation
  • Participate actively in formal design reviews, code peer reviews, and technical defect resolution
  • Work within structured engineering frameworks applying both Agile and Waterfall development lifecycles

Qualification

Required

  • Active and transferable U.S. government issued security clearance is required prior to start date
  • U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
  • Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date
  • Bachelor's degree in Science, Technology, Engineering, or Mathematics (STEM) discipline. Degree must be obtained by start date
  • Experience developing, testing, or integrating software applications using one or more programming languages, such as C, C++, C#, Python, or Visual Basic (VB/VBA/.NET)
  • Experience developing, building, and debugging software applications targeting Windows operating systems using the Microsoft Visual Studio integrated development environment (IDE)
  • Experience may be obtained through on-the-job experience, research, coursework, or projects

Preferred

  • Demonstrated foundation in software development principles and Object-Oriented Design (OOD/OOP), including encapsulation, inheritance, polymorphism, and modular class structure
  • Experience or coursework utilizing C# or modern C++ in an engineering or laboratory test setting
  • Familiarity with hardware/software interfacing, test automation frameworks, or instrumentation control (e.g., via GPIB, Ethernet, or serial interfaces)
  • Hands-on exposure to version control tools (such as Git) and Agile software development practices
  • Strong diagnostic and analytical problem-solving skills applied to complex software/hardware integration issues

Benefits

  • Relocation Eligibility
  • Medical insurance
  • Dental insurance
  • Vision insurance
  • 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
  • Annual short-term and/or long-term incentive compensation programs for eligible hired applicants, depending on the level of the position and whether or not it is covered by a collective-bargaining agreement
RTX operates as an aerospace and defense company as it solves the hardest problems in aerospace and defense.
Glassdoor
3.7
Founded in 2020
Arlington, Virginia, USA
10001+ employees
http://rtx.com/