Senior Test Engineer (QRF)

Infleqtion is a global quantum technology company solving the world’s most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables “quantum everywhere” through our ecosystem of devices and platforms

We are seeking a Senior Test Engineer to support the development and validation of prototype QRF systems and subsystems moving towards scalable products. This individual will work across hardware, software, and R&D teams to develop and execute test plans, set up and interface with test equipment, and automate pilot line test processes. A strong candidate will have hands-on experience with test automation, scripting, hardware validation, and embedded system testing in a Linux-based environment.

The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all the following duties. Duties, responsibilities, and activities may change, or new ones may be assigned at any time with or without notice.

• Develop, maintain, and execute test strategies and test plans for atomic clock systems and subsystems.
• Lead End of Line test plan definition for new products and features, in collaboration with firmware, software, and hardware design teams.
• Design and deploy optical and electrical test benches for system integration.
• Perform compliance, robustness, and reliability testing on electronic and optical subsystems.
• Support board bring-up and debugging efforts, providing feedback to design teams.
• Develop and maintain an automated test platform using Python.
• Operate and interface with a range of electrical and optical lab test equipment.
• Process and visualize test data, leveraging scripting and analysis tools to extract meaningful insights.
• · Work within Git-based software development workflows to track, version, and collaborate on test software.

Bachelor’s degree in Electrical Engineering, Computer Engineering, or a related field.

• 4+ years of relevant industry experience with a focus on hardware validation and system integration testing.
• Strong programming skills in Python and other scripting languages.
• Familiar with at least one compiled language (C/C++/Rust).
• Hands-on experience with optical and electronic test equipment, including oscilloscopes, DMMs, OSAs, and VNAs.
• Strong understanding of communication protocols (USB, I2C, SPI, serial comms, etc.).
• Ability to process, analyze, and visualize test data to drive design decisions and improvements.
• Comfortable working in Linux environments with command-line tools for scripting and automation.
• Collaborate with a cross-functional team to support product development from prototype to production
• Experience with Git and modern software development workflows.
• Strong analytical and problem-solving skills, with experience in root cause analysis and debugging embedded systems.

Preferred Experience

• Advanced degree in electrical engineering, Computer Engineering, Physics, or a related field.
• 6+ years of experience in hardware test and validation.
• Experience with firmware integration, embedded system validation, and debugging.
• Experience with environmental reliability testing and compliance validation.
• Knowledge of regulatory compliance standards relevant to test and validation processes.
• Prior experience working with atomic, optical, or quantum technologies.
• Ability to travel to support remote test integration and commissioning as required.

This position may require access to information protected under U.S. export control laws and regulations, including the Export Administration Regulations (EAR) and the International Traffic in Arms Regulations (ITAR). Any offer of employment may be conditioned on authorization to receive software, hardware, or technology controlled under these laws without sponsorship for an export license.

• Salary Range: per year 160000-185000
• 100% company-paid medical, dental, vision, short/long-term disability  
• Employer-funded Health Savings Account  
• Unlimited PTO  
• 401(k) match  
• Company-paid Life and AD&D Insurance  
• Flexible Savings Account  
• Paid FMLA, Maternity/Paternity Leave  
• Employee Assistance Program  
• Student Loan Repayment 
• Equity Program

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.