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Mechanical Design Engineer



Daresbury, Warrington WA4, UK
Posted on Thursday, May 2, 2024

PsiQuantum is on a mission to build the world’s first fault tolerant quantum computer capable of tackling today’s most intractable computational challenges to deliver transformative results. We know that means it will need roughly 1 million qubits and will be building scale in size.

Quantum computing is expected to deliver breakthroughs for today’s still impossible computational tasks. By harnessing the laws of quantum physics, quantum computers can provide exponential performance increases over even the most powerful of today’s conventional supercomputers offering the potential for extraordinary advances across a broad range of applications including climate, energy, healthcare, pharmaceuticals, finance, agriculture, transportation, materials design, and many more.

PsiQuantum is uniquely positioned to deliver on the promise of quantum computing. Our architecture is based on photonics which gives us the ability to produce our components using high-volume semiconductor manufacturing processes, the same processes that have been applied in telecommunications and data center applications for decades. Since photons don’t feel heat, we can take advantage of existing cryogenic cooling systems, the kind that have been operating at facilities like Stanford Linear Accelerator (SLAC) since 2018. And because photons are basically light, they can move between subsystems using standard fiber connectivity, without the need for transduction in and out.

Our team is working across the full stack of quantum computing, from quantum architecture to photonic chip manufacturing, advanced opto-electronic packaging, hardware systems design, quantum algorithms and software tools, and cryogenic cooling. We’re a highly motivated and collaborative group focused on a singular goal - building the world’s first Fault Tolerant Quantum Computer on the fastest path possible.

There’s more work to be done and we are looking for exceptional talent to join us on this extraordinary journey!

Job Summary:

The cryogenic engineering department is hiring a Mechanical Design Engineer who will be heavily involved in the cryogenic system design for the quantum computer. This position will interact with multiple teams internally and suppliers externally.


  • In this role as Mechanical Design Engineer, you will focus primarily on the development of modern cryogenic-related and vacuum-related equipment.
  • Detailed layout of the cryogenic process, including cryostats, helium transfer lines, valve boxes, pumps, and cryoplant systems.
  • Acting as a detailer to produce assembly drawings, detail drawings, and layouts based on input from cryogenic engineers.
  • General design activities such as requirements management, materials and component selection, Design Failure Modes and Effects Analysis (FMEA), and tolerance analyses.
  • Reviewing drawings for accuracy, conformance to project requirements, manufacturability, and established company practices and procedures.
  • Possessing high technical aptitude and being able to: visualize physical forms, develop feasible configurations, and understand engineering information.
  • Participate in Cryostats and Cryoplant commissioning.


  • Bachelor’s degree Degree in a technical field, and 3 plus years of relevant mechanical design experience.
  • Knowledge of vacuum-related manufacturing processes, materials, and their applications.
  • Working knowledge of drafting standards and methods, geometric dimensioning & tolerancing.
  • Aptitude in computer-aided parametric solid modeling design and detailing.
  • Software tools – Solidworks, PTC Creo, Siemens NX.
  • Experience with PLM software and document management system, Team Center, Windchill, Agile.

Desired Skills/Experience:

  • Experience working with cryogenic systems, cryostats, cryocoolers, vacuum chamber.
  • Experience working with ASME Boiler Pressure Vessel Code and PED Pressure Vessel Code.
  • Knowledge on fabrication methods such as machining, welding, brazing, soldering, forming, etc.
  • Solid understanding of Geometric Dimensioning & Tolerancing per ASME Y14.5.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

We are not accepting unsolicited resumes from employment agencies.