Cryogenic Semiconductor Characterization Engineer - 652

Quantinuum; Broomfield (CO); On-site; USD 113,000 - 141,000; Full time

Benefits offered by this job

Flexible work schedule

Employer subsidized health, dental, and vision insurance

Equity and 401(k) retirement savings plan

Paid parental leave

Employee discounts

Job summary

Quantinuum is looking for a Cryogenic Semiconductor Characterization Engineer in Broomfield, CO. In this vital role, you'll develop the next-generation quantum computers by defining and executing cryogenic semiconductor characterization strategies.

Ideal candidates will have a Bachelor's degree, over 4 years of relevant experience, and be skilled in Python. The position offers a competitive salary ranging from $113,000 to $141,000 annually, with generous benefits.

Qualifications

• 4+ years of experience in an engineering or R&D environment.
• 3+ years developing test equipment and executing test plans.
• 2+ years of hands-on experience with cryogenic test chambers.

Responsibilities

• Own cryogenic semiconductor characterization end-to-end.
• Design and develop electrical interfaces for cryogenic environments.
• Translate system-level quantum computer requirements into test plans.

Skills

Developing test equipment

Hands-on experience with cryogenic test chambers

Strong Python skills for automation and data analysis

Understanding of EMI/EMC, grounding, and return current paths

Education

Bachelor's degree

Master's or PhD in Electrical Engineering

Job description

We are seeking a Cryogenic Semiconductor Characterization Engineer to join our Broomfield, CO, team and play a hands‑on role in developing Quantinuum's next‑generation Apollo and Lumos quantum computers. This is a rare opportunity for an early‑to‑mid‑career physicist or engineer to stand up, own, and operate cryogenic semiconductor characterization from the ground up, directly shaping the technologies that power our system roadmap.

In this role, you won't just run tests—you'll define the cryogenic characterization strategy, build the infrastructure, and drive execution across multiple systems and technologies. You'll work side‑by‑side with ASIC designers, system architects, and experimental physicists in a fast‑paced R&D environment where initiative, creativity, and technical depth truly matter.

If you're excited by complex hardware, ultra‑low‑temperature physics, and seeing your work make it into real quantum machines, this role is for you.

Key Responsibilities

• Own cryogenic semiconductor characterization end‑to‑end, from roadmap definition to daily lab execution
• Partner with integrated product teams to implement and validate ASICs critical to Quantinuum's quantum computer roadmap
• Design and develop electrical interfaces, fixtures, and test equipment for cryogenic environments
• Automate test execution and data analysis to enable fast, repeatable insight
• Synthesize test results, understand their impact and present physics, engineers, and leadership
• Operate and manage cryogenic test chambers and associated lab infrastructure
• Translate system‑level quantum computer requirements and customer needs into clear, verifiable test plans
• Thrive in a rapid‑prototyping, R&D‑focused environment where iteration speed matters

YOU MUST HAVE

• Bachelor's degree minimum required
• 4+ years of experience in an engineering or R&D environment minimum required
• 3+ years developing test equipment and executing test plans to validate and characterize digital and analog circuits minimum required
• 2+ years of hands‑on experience with cryogenic test chambers minimum required
• Due to contractual requirements, must be a U.S. Person defined as a U.S. citizen, permanent resident or green card holder, workers granted asylum or refugee status
• Due to national security requirements imposed by the U.S. Government, candidates for this position must not be a People's Republic of China national or Russian national unless the candidate is also a U.S. citizen

WE VALUE

• Master's or PhD in Electrical Engineering or a related field preferred
• 5+ years of industry experience in engineering or R&D
• Hands‑on experience with low‑noise analog electronics
• Strong understanding of EMI/EMC, grounding, and return current paths in sensitive systems
• Experience with ASIC development and testing
• Strong Python skills for automation and data analysis
• Familiarity with the electrical engineering challenges of quantum computers, ion traps, or similar ultra‑sensitive systems
• Clear communicator who produces right‑sized, effective design and test documentation

Compensation & Benefits

The pay range for this role is $113,000 -- $141,000 annually. Actual compensation within this range may vary based on the candidate's skills, educational background, professional experience, and unique qualifications for the role.

• A competitive salary and innovative, game‑changing work
• Flexible work schedule
• Employer subsidized health, dental, and vision insurance
• 401(k) match for student loan repayment benefit
• Equity, 401(k) retirement savings plan + 12 paid holidays and generous vacation + sick time
• Paid parental leave
• Employee discounts

Quantinuum is an equal opportunity employer. You will be considered without regard to age, race, creed, color, national origin, ancestry, marital status, affectional or sexual orientation, gender identity or expression, disability, nationality, sex, or veteran status.