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, 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

$113,000 - $141,000 a year

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.

Quantinuum is the world leader in quantum computing. The company’s quantum systems deliver the highest performance across all industry benchmarks. Quantinuum’s over 650 employees, including 400+ scientists and engineers, across the US, UK, Germany, and Japan, are driving the quantum computing revolution.

By uniting best-in-class software with high-fidelity hardware, our integrated full-stack approach is accelerating the path to practical quantum computing and scaling its impact across multiple industries.

By joining Quantinuum, you’ll be at the forefront of this transformative revolution, shaping the future of quantum computing, pushing the limits of technology, and making the impossible possible.

What’s in it for you?

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, 401k 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. Know Your Rights: Workplace discrimination is illegal

Learn more about this Employer on their Career Site

Cryogenic Semiconductor Characterization Engineer - 652