Software Engineer - Test Systems

We are hiring Senior Software Engineer – Test Systems (ATE / C# / Hardware Integration) to build software for automated test systems (ATE) used in aerospace and defense. Hands‑on role working across C#, C++, hardware integration, and real‑world production systems. We hire and grow engineers who thrive on solving hard problems and turning bold ideas into real‑world solutions. If you’re driven to design, develop, and test technology that truly makes an impact, you’ll feel at home here.

Join Quest Defense Systems & Solutions as our Senior Software Engineer to develop software for automated test equipment (ATE) and factory test systems supporting advanced aerospace and defence products. This is a hands‑on engineering role focused on building applications, integrating hardware, and troubleshooting real‑world test environments. You’ll work directly with instrumentation, production systems, and hardware interfaces, making a tangible impact on product quality and delivery.

Location:

Tucson or Scottsdale, AZ (onsite). Relocation:
Available. Clearance: U.S. Citizenship required (Secret Clearance preferred).

• Develop test software applications, libraries, and instrument drivers (C#, C++)
• Integrate software with automated test equipment (ATE) and lab instrumentation
• Troubleshoot software and hardware integration issues in production environments
• Collaborate with electrical, systems, and manufacturing engineers
• Work in a fast‑paced environment supporting real production systems

Engineers from aerospace, defense, manufacturing, or industrial automation backgrounds are encouraged to apply.

• 5+ years of experience in software development (C#, C++, or similar)
• Experience with test systems, hardware integration, or instrumentation
• Strong troubleshooting skills across software and physical systems
• Experience with Windows OS, Visual Studio, Azure Dev Ops
• Bachelor’s degree in STEM (or equivalent experience)
• U.S. Citizenship (clearance eligible)

• Experience with Automated Test Equipment (ATE)
• Familiarity with NI tools (VISA, MAX, etc.) or LabVIEW
• Knowledge of hardware interfaces (TCP/IP, UDP, RS-422)
• Background in aerospace, defense, or manufacturing

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.

• 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.

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

Full compensation package is based on candidate experience and certifications.

Pay range: $69,000 – $74,000 USD.

Quest Defense provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training. The physical demands described below are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.