RF/Microwave Design Engineer

Company Description

QTREX Quantum Ltd. (Nasdaq: QTEX) is a technology company focused on advanced connectivity and electronics manufacturing solutions for next-generation hardware markets.

The Company develops high-density, thermally optimized quantum connectivity solutions for dilution cryostats, and advances Additively Manufactured Electronics (AME) applications for defense, aerospace, missile, space, and other mission-critical environments.

Our AME printing systems combine precision inkjet printing, advanced materials, software, motion control, and vision technologies in a single system.

Role Description

• Design and simulate RF/microwave components and subsystems across the qubit control and readout signal chain, from concept through validation

• Develop and validate cryogenic RF signal chains, including attenuation and filtering budgets, thermal anchoring, and noise management from 300 K to the mixing chamber

• Design controlled-impedance RF PCBs, interconnect transitions, and shielding/grounding solutions

• Perform microwave measurements (VNA S-parameters, calibration, de-embedding) and correlate results against EM simulation

• Build automation and data-analysis tooling for simulation sweeps and measurement workflows

• Support system bring-up, debug, and characterization in dilution refrigerators

• Collaborate with multi-disciplinary team members to define and flow down requirements

Required Qualifications

• BSc in EE, Applied Physics, or related field with 5+ years of RF/microwave design experience — or an MSc/PhD in a related field

• Experience with 3D EM simulation tools (HFSS, CST, or COMSOL)

• Experience with microwave measurements using a VNA (S-parameter characterization, calibration, de-embedding)

• Experience in RF PCB design and/or shielding and grounding techniques

Preferred Qualifications

• Cryogenic measurement experience (dilution refrigerator wiring, thermal anchoring, attenuation/filtering budgets)

• Design experience with passive and/or active microwave devices: filters, couplers, hybrids, matching networks, and amplifiers

• Background in superconductivity or superconducting devices

• Familiarity with microwave components in the qubit signal chain

• Scripting for automation and data analysis (Python, MATLAB)

• Experience or knowledge of 3D printing technologies for RF/microwave hardware