Quantum R&D Engineer - TWPA

Job Title

Quantum R&D Engineer - TWPA

Role Summary

Design and develop Josephson Travelling Wave Parametric Amplifiers (TWPAs) for qubit readout: translate product requirements into TWPA architectures, simulate and iterate designs, and integrate peripheral on-chip components. The role sits on an R&D engineering team focused on microwave and superconducting circuit development for quantum processors.

This is a hands-on research-and-development position that emphasizes simulation-to-fabrication matching, bandwidth and noise optimization, and integration of pump coupling and isolation functions.

Experience Level

Mid-level. The role expects more than 3 years of hands-on experience in advanced microwave design and simulation; candidates with substantially more experience are also welcome.

Responsibilities

Key responsibilities include translating specifications into working amplifier designs, miniaturising architectures, and driving integration of peripheral functions.

• Convert product specifications and features into TWPA circuit layouts and simulation models.
• Design, iterate, and optimise compact TWPA architectures with integrated on-chip peripherals (pump coupling, isolation, matching networks).
• Perform electromagnetic and non-linear circuit simulations and validate designs against cryogenic measurement data.
• Investigate approaches to extend bandwidth and improve noise performance.
• Resolve simulation-to-fabrication mismatches through experimental feedback and design adjustments.
• Document and present technical findings and proposals to technical and non-technical stakeholders to influence product decisions.
• Remain current with literature and state-of-the-art techniques in parametric amplification and superconducting microwave circuits.

Requirements

Required technical skills and experience for immediate contribution. Soft skills and collaborative traits are also listed.

• Must-have: >3 years hands-on experience with advanced microwave design and simulation (e.g., CST, HFSS) and demonstrated success matching simulations to cryogenic measurement data.
• Must-have: Practical experience with parametric amplifiers or superconducting microwave circuits and non-linear circuit behavior (TWPAs, JPAs, or closely related devices).
• Must-have: Proven independent problem-solving in an R&D setting and strong technical communication skills to present results across disciplines.
• Must-have: Experience with integration of on-chip peripheral components (pump coupling, isolation, matching) and miniaturisation efforts.
• Nice-to-have: Familiarity with metamaterial-based amplifier architectures, experience with cryogenic measurement setups, scripting for automation and data analysis, or a record of relevant publications.

Education Requirements

PhD or equivalent industry experience in quantum-limited amplification, parametric amplifiers (e.g., TWPAs, JPAs), or closely related superconducting microwave circuits; fields include non-linear metamaterials, Josephson circuits, and related physics/engineering domains. Equivalent practical industry experience is explicitly accepted.

About the Company

Company: QuantWare

Headquarters: Delft, Netherlands

QuantWare develops superconducting quantum processors using its VIO™ QPU architecture to enable scalable, high‑qubit quantum computers. The company focuses on qubit chip design, cryogenic readout, and modular QPU architectures to advance performance and manufacturability.