Senior Software Engineer

Engineers are the reason we exist—they’re the core of who we are. Embark on a journey with EXB Solutions at the forefront of technological innovation as we seek talented Engineers to shape the future of cutting‑edge projects and contribute to a culture of excellence and creativity. What we do matters.

Immediately Hiring Principal or Senior Software Engineer – Test Equipment & Factory Systems Support

Join Quest Defense Systems & Solutions, supporting the development of advanced aerospace and defense products through cutting‑edge software and test systems engineering. We are seeking a hands‑on Senior Software Engineer who thrives in fast‑paced engineering environments and enjoys solving complex problems at the intersection of software, hardware, and production systems.

In this role, you will design, develop, integrate, and maintain software applications used to support engineering labs, factory test environments, and weapon system product development. You’ll work with C#, C++, and other modern programming languages to build applications, drivers, and tools that interface directly with instrumentation, automated test equipment, and hardware systems critical to product performance and delivery.

You’ll collaborate closely with multidisciplinary teams across software, electrical, systems, and manufacturing engineering to develop solutions that improve efficiency, reliability, and test capability. This is an excellent opportunity for an engineer who enjoys both software development and real‑world hardware integration, while mentoring junior engineers and contributing to programs with real mission impact.

Due to the nature of this role, all candidates must be U.S. citizens. Active Secret Clearance required or ability to obtain interim clearance before start

This role is onsite in Scottsdale, AZ. Relocation assistance is provided.

Key Responsibilities:

• Design, develop, and integrate object‑oriented software applications using C#, C++ in Microsoft Visual Studio in a Windows Operating System (OS)
• Prioritize and handle multiple software engineering tasks concurrently
• Troubleshoot software and test equipment instrumentation
• Work in a multidisciplinary engineering team environment
• Develop and derive requirements for software products
• Lead and mentor junior software engineers

Required Qualifications:

• Typically requires a bachelor’s degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 5 years of prior relevant experience, or an Advanced degree in a related field and a minimum of 3 years’ experience.
• Experience in developing and integrating software applications using programming languages, including but not limited to C++, C#, Java, Python, or Visual Basic.
• Experience with Windows Operating System and Microsoft Visual Studio is required.

Desired Qualifications:

• Familiar with computer architecture and computer hardware optimization techniques
• Working knowledge of the development of software drivers for the operation of computer hardware interfaces
• Working knowledge in common computer hardware interface and data protocols such as TCP/IP, UDP, or RS-422
• Familiarity with laboratory test instrumentation, electronics, and software (Ex. oscilloscopes, power supplies, digital multimeters)
• Experience with Unified Modeling Language (UML) to visualize software architecture and design
• Experience of software development lifecycles, such as Waterfall and Agile
• Experience with Software Configuration Management principles
• Experience with Microsoft Azure DevOps Server or GitHub
• Good written and interpersonal communication skills

The QDSS Advantage:

At QDSS, our advantage is purpose‑driven work, collaborative teams, and complex challenges that push boundaries and build lasting impact. You’ll grow your career while contributing to mission‑critical programs that demand excellence and shape the future.

What You’ll Find Here

• Work That Matters – Next‑generation, safety‑and mission‑critical projects where your contributions have real‑world impact.
• Growth That’s Supported – Competitive compensation, employer‑matched 401(k), certification assistance, and clear opportunities for advancement.
• A Culture That Works – A flexible, collaborative, and people‑first environment where teamwork, innovation, and balance are valued.

Benefits Include

• Competitive pay, comprehensive medical/dental/life and disability coverage, 401(k) with employer match, professional development support, and a flexible, friendly workplace.