Cryogenic Electrical Interconnect Engineer

Entangled Future; Milpitas (CA); Remote; USD 110,000 - 150,000; Full time

Job summary

PsiQuantum in Milpitas, CA is seeking a Cryogenic Electrical Interconnect Engineer to design, develop, and test interconnect solutions for cryogenic systems. Responsibilities include cables, connectors, feedthroughs, and PCB interconnects compatible with vacuum and cryogenic environments.

The ideal candidate combines electrical interconnect expertise with mechanical insight, capable of threading through concept to detailed design, qualification testing, manufacturing, and troubleshooting in a

Qualifications

• 3+ years designing electrical interconnects, cables, and connectors.
• Strong understanding of grounding, shielding, and signal integrity.
• Understanding mechanical principles for connector and cable design.
• Experience with 3D CAD; Siemens NX preferred.

Responsibilities

• Design cables and cable assemblies for operation in vacuum and cryogenic environments.
• Design feedthroughs and interconnects across cryostat vacuum boundaries.
• Create 3D CAD models, drawings, interfaces, and specifications for cables/connectors/feedthroughs.
• Collaborate with electrical, mechanical, PCB, cryogenic, and system engineering teams to define interconnect requirements.

Skills

Electrical interconnect design

Connectors & cables

3D CAD design

Electrical signal integrity

Education

BSc or MSc in Electrical/Mechanical/Electromechanical Engineering

Tools

Siemens NX

Job description

Cryogenic Electrical Interconnect Engineer at PsiQuantum, Milpitas, California (remote). A mid-level full time position in the 3370 - Cryogenics Engineering team, listed under hardware engineering.

Job Summary

The Cryogenic Electrical Interconnect Engineer is responsible for the design, development, integration, and testing of electrical interconnect solutions used within PsiQuantum's cryogenic systems.

This role focuses on cables, connectors, electrical feedthroughs, and PCB interconnects operating in vacuum and cryogenic environments. The engineer develops the electrical connection architecture required to interconnect components within the cryostat, provide reliable connections at cryogenic temperatures, and route electrical signals through the cryostat vacuum boundary to external equipment.

The Cryogenic Electrical Interconnect Engineer combines electrical and mechanical engineering expertise to develop interconnect solutions that meet electrical performance, thermal, mechanical, vacuum, and integration requirements. The role supports engineering activities from concept development through detailed design, component selection, qualification testing, manufacturing, installation, and troubleshooting.

The ideal candidate combines electrical interconnect expertise with strong mechanical engineering judgment and an understanding of the challenges associated with vacuum and cryogenic environments.

They are comfortable working at the interface between electrical, mechanical, thermal, and cryogenic engineering and can translate electrical connectivity requirements into practical cable, connector, feedthrough, and PCB interconnect solutions.

They are able to move between detailed 3D design, component selection, engineering analysis, supplier coordination, hands-on testing, integration, and troubleshooting. Success in this role requires attention to detail, practical engineering judgement, and effective collaboration across electrical, mechanical, cryogenic, system, and supplier teams.

Responsibilities

• Design electrical cables and cable assemblies for operation in vacuum and cryogenic environments.
• Design electrical feedthroughs and interconnect solutions across cryostat vacuum boundaries.
• Design and integrate electrical connectors for PCB and electronic components operating at cryogenic temperatures.
• Develop interconnect architectures between electronic components located inside the cryostat and external room-temperature equipment.
• Select cables, conductors, connectors, feedthroughs, insulation materials, and associated components based on electrical, thermal, mechanical, vacuum, and cryogenic requirements.
• Evaluate thermal conduction through electrical cables and interconnects and contribute to the management of cryostat thermal loads.
• Design cable routing, mechanical supports, strain relief, and thermal anchoring solutions within the cryostat.
• Evaluate mechanical and thermal effects on connectors and cable assemblies, including differential thermal contraction during cooldown and warmup.
• Develop 3D CAD models, drawings, interface definitions, and specifications for cables, connectors, feedthroughs, and associated mechanical components.
• Work closely with electrical, mechanical, PCB, cryogenic, and system engineering teams to define and manage interconnect requirements and interfaces.

Requirements

• BSc Courses, Eligibility, Fees & Verified Programs | B.SC . or M.Sc. 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 electrical interconnect design, including conductors, insulation, connectors, shielding, grounding, and signal integrity considerations.
• Good understanding of mechanical engineering principles relevant to connector and cable design, including tolerances, mechanical interfaces, strain relief, and material selection.
• Experience designing components and assemblies using 3D CAD software. Experience with Siemens NX is preferred.
• Ability to develop engineering drawings, specifications, interface definitions, and component requirements.
• Ability to work across electrical and mechanical engineering disciplines to develop integrated solutions.
• Ability to adapt to changing requirements and handle multiple assignments.
• Experience designing cables, connectors, or electrical feedthroughs for vacuum and/or cryogenic environments.