Cryogenic Electrical Interconnect Engineer

Job Description

Job Title: Cryogenic Electrical Interconnect Engineer. Location: Milpitas, California, United States

Responsibilities:

• Design electrical cables and cable assemblies for vacuum and cryogenic environments.
• Design electrical feedthroughs and interconnects across cryostat vacuum boundaries.
• Design and integrate electrical connectors for PCBs and electronic components operating at cryogenic temperatures.
• Develop interconnect architectures connecting components inside cryostats with external room-temperature equipment.
• Select cables, conductors, connectors, feedthroughs, insulation materials, and related components based on electrical, thermal, mechanical, vacuum, and cryogenic requirements;
• Evaluate thermal conduction through electrical cables and contribute to cryostat thermal-load management.
• Design cable routing, mechanical supports, strain relief, and thermal anchoring solutions.
• Evaluate differential thermal contraction and other mechanical and thermal effects during cooldown and warmup.
• Develop 3D CAD models, engineering drawings, interface definitions, and specifications.
• Collaborate with electrical, mechanical, PCB, cryogenic, and systems engineering teams;
• Support component selection and qualification through engineering analysis and testing.
• Develop and execute testing for electrical, mechanical, thermal, vacuum, and cryogenic performance.
• Support procurement, manufacturing, installation, integration, commissioning, and troubleshooting.
• Work directly with cable, connector, feedthrough, and electronics suppliers.
• Analyze field and test issues and develop technical solutions.

Qualifications:

• BSc or MSc in Electrical Engineering, Mechanical Engineering, Electromechanical Engineering, or a related engineering discipline.
• 3+ years of experience designing electrical interconnects, cable assemblies, connectors, electronic packaging, or related electromechanical systems.
• Professional experience with connectors and cables for electronic components and systems.
• Strong understanding of conductors, insulation, connectors, shielding, grounding, and signal integrity;
• Understanding of mechanical engineering principles related to tolerances, mechanical interfaces, strain relief, and material selection.
• Experience designing components and assemblies using 3D CAD software. Siemens NX experience is preferred.
• Ability to develop engineering drawings, specifications, interface definitions, and component requirements.
• Ability to work across electrical and mechanical engineering disciplines.
• Ability to adapt to changing requirements and manage multiple assignments.
• Experience designing cables, connectors, or electrical feedthroughs for vacuum or cryogenic environments.
• Experience with cryogenic electronic systems and electrical interconnects;
• Experience with superconducting cables, superconducting electrical connections, or other low-temperature electrical technologies.
• Understanding of material behavior at cryogenic temperatures, including differential thermal contraction.
• Understanding of thermal conduction through electrical wiring and cable thermal anchoring.
• Experience with hermetic electrical feedthroughs and vacuum-compatible connectors and materials.
• Experience with PCB connectors and electronic packaging for cryogenic applications.
• Experience with low-noise, high-density, high-frequency, or other performance-sensitive electrical interconnects.
• Hands-on experience assembling, testing, and troubleshooting cables, connectors, feedthroughs, and electronic hardware.
• Experience with vacuum, thermal cycling, cryogenic, and electrical qualification testing.
• Familiarity with soldering, crimping, brazing, and related joining techniques.
• Understanding of Geometric Dimensioning & Tolerancing according to ASME Y14.5.

Benefits And Compensation:

• Zone 1, Bay Area and NYC: $126,600 to $148,700 annually.
• Zone 2, including Los Angeles and Washington DC: $113,900 to $133,800 annually.
• Zone 3, including Austin, Chicago, and Sacramento: $101,300 to $119,000 annually.
• Zone 4, including Nashville, Phoenix/Tempe, and many remote locations: $88,600 to $104,100 annually.
• Full-time employees are eligible for equity and benefits.
• Competitive health coverage for employees and dependents.
• 401(k) with company match;
• Equity grants.
• Financial wellness tools and planning resources.
• Wellness benefits and family support programs.
• Life and disability insurance.
• Paid leave and company-designated holidays.
• Discretionary time off.
• End-of-year company shutdown.

Application Instructions:

• Submit a resume/CV and cover letter.
• Include the word "purple" in the cover letter.
• Provide education, LinkedIn profile, work authorization, and visa sponsorship information as requested.
• PsiQuantum will only contact candidates through an official PsiQuantum email address and will not request bank account information during the interview process.