Senior Low Temperature Device Engineer (SNSPDs)

About Xanadu:
Xanadus mission is to build quantum computers that are useful and available to people everywhere.

At Xanadu we are learners innovators researchers collaborators and problem solvers. We are creating something that has never been built before. Few people in their life will be able to be a part of something like this where if we are successful the technologies we develop will solve some of the worlds most challenging problems and literally change the world. And that is something to be excited about!

Your role and responsibilities:

In this role you will apply your expertise in superconducting single-photon detector engineering to advance the performance and scalability of our SNSPD platform.

As a member of the Low Temperature Devices team you will be responsible for designing high-performance single-photon detectors with ultra-high system detection efficiency fast reset times and scalable integration into large detector arrays.

You will work across design simulation layout and testing to take devices from concept through validation and deployment

Drive improvements in key SNSPD performance metrics relevant to Xanadus architecture through device design and optimization

Translate device designs into tapeout-ready GDS layouts for fabrication with external foundries

Contribute to the end-to-end device development lifecycle from concept through validation and deployment in multi-pixel arrays

Develop and execute cryogenic test plans to characterize detector performance Execute iterative cryogenic testing to validate optical coupling performance repeatability and long-term stability

Analyze device performance data to inform design iterations and process improvements

Collaborate with internal teams and external partners across process integration packaging and fabrication

Contribute to scaling strategies for high-density detector arrays including layout integration and multiplexing constraints

Basic qualifications and experience:

PhD in Physics Electrical Engineering Mechanical Engineering or a closely related field plus at least 2 years of postdoctoral or industry experience

Demonstrated experience designing laying out and characterizing SNSPDs Strong understanding of superconducting device physics and single-photon detection mechanisms

Hands-on experience with cryogenic measurement systems and device characterization

Experience using analog test equipment (e.g. VNA SMU) for high-frequency and low-noise measurements

Experience using Python for component design simulation layout and data analysis

Ability to work independently and collaboratively in a fast-paced cross-disciplinary environment

Strong attention to detail and a rigorous data-driven approach to problem solving Excellent written and verbal communication skills

Preferred qualifications and experience:

Experience operating sub-Kelvin helium-based cryostats including cooldown troubleshooting and maintenance

Experience with high-bandwidth RF readout and detector interfacing

Simulation experience for device-level modeling (e.g. COMSOL pyTDGL)

Familiarity with statistical process control and yield optimization in fabrication workflows

Experience with large-scale detector arrays or multiplexed readout architectures

This is for a new position. Your base salary will be determined based on your location experience and internal benchmarks. The base salary range is 150000 - 200000 CAD. You will also be eligible for equity and benefits.

Our values are important. They are fundamental and lay the foundation for culture at Xanadu. Learn more about our values here.

We are an equal opportunity employer and encourage candidates of all backgrounds to apply. We are committed to building an inclusive safe and equitable culture and fostering an environment where our employees feel included valued and heard. We are committed to meeting the needs of all individuals and support a barrier-free workplace. Should you require accommodations at any point during the recruitment process please contact Recruiting at .

Please be advised that we may use artificial intelligence (AI) tools to assist in the screening and assessment of applicants for this position. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed please contact us.