About The Role and Team
As a Senior Quantum Engineer, you will play a critical role in the development and execution of experiments focused on silicon-based quantum computing systems. This is a rare and exciting opportunity to be an employee at a scale-up shaping the future of quantum computing.
You would be part of the Quantum Hardware Team that specializes in designing, validating and operating quantum processors based on silicon industrial technology. More particularly, as part of the ERC CoG project QuDos, you would focus on developing ultra-low-power microwave qubit control and readout electronics for quantum computers.
Our Team
Since 2021 our team has been listed every year in the “Top 100 Startups worth watching” in the EE Times, and our technology breakthroughs have been featured in The Telegraph, BBC and the New Statesman. Our founders are internationally renowned researchers from UCL and Oxford University who have pioneered the development of qubits and quantum computing architectures. Our chairman is the co-founder of Cadence and Synopsys, the two leading companies in the area of Electronic Design Automation. We’re backed by a team of top-tier investors including Bosch Ventures, Porsche SE, Sony Innovation Fund, Oxford Sciences Innovations, INKEF Capital and Octopus Ventures, and we have so far raised over £62 million in equity and grant funding.
We bring together the brightest quantum engineers, integrated circuit (IC) engineers, quantum computing theoreticians and software engineers to create a unique, world-leading team, working together closely to maximise our combined expertise. Our collaborative and interdisciplinary culture is an ideal fit for anyone who thrives in a cutting-edge research and development environment focused on tackling big challenges and contributing to the development of scalable quantum computers based on silicon technology.
Our team of 100+ is based in the UK (Oxford and London), Australia (Sydney) and Spain (San Sebastián).
We are proud to expand our operations in San Sebastián, Spain in the new CIC nanoGUNE Quantum Tower. This expansion is part of the European Research Council - Consolidator Grant, QuDos, awarded to Prof. M. Fernando Gonzalez-Zalba to develop low-power quantum electronics devices based on semiconductor nanostructures.
Functions of the Role
- Design and demonstrate ultra-low power devices for qubit control and readout based on non-linear reactive elements such as the quantum capacitance of silicon quantum dots and the kinetic inductance of thin-film superconductors.
- Perform combined demonstration of the aforementioned devices with silicon qubit structures.
Experience - Essentials
- A PhD degree in physics or engineering
- Proven record of experience in the development of quantum-limited amplification (e.g. JPAs, TWPAs)
- Experience with high-frequency electronic simulation software (e.g. Keysight ADS, Ansys HFSS, CST Microwave Studio).
- Familiar with the use of high-frequency electronics: AWGs, MW signal generators, IQ (de)modulators
- Ability to independently design and carry out complex experiments; perform data analysis and preparation of technical reports and presentations
- Knowledge of data acquisition software (Python)
- Ability to work in a team
- Excellent verbal and written communication skills
Experience - Desirable
- Experience with the use of deep cryogenic measurement systems
- Experience with the dynamical characterisation silicon-based nanoelectronic devices
- Knowledge of quantum information systems and operations
- Ability to supervise research students
Benefits
- Be part of a creative, world-leading team
- Competitive salary
- Flexible working hours
- Choice of laptop
EEO Statement
Quantum Motion is committed to providing equal employment opportunity and does not discriminate based on age, sex, sexual orientation, gender identity, race, color, religion, disability status, marital status, pregnancy, gender reassignment, or any other protected characteristics covered by Spanish employment law.
TECHNICAL & MARKET ANALYSIS | Appended by Quantum.Jobs
The primary value proposition of this role is addressing the acute energy and thermal dissipation challenges inherent in scaling solid-state quantum processors. By innovating ultra-low-power, on-chip microwave control and readout circuitry using parametric amplification principles—specifically leveraging quantum capacitance and kinetic inductance—this position directly contributes to the industrial viability of silicon-based quantum computing architectures. The integration of advanced semiconductor physics with RF/microwave engineering expertise at deep cryogenic temperatures is essential for moving past laboratory-scale quantum systems to commercially scalable, dense qubit arrays capable of executing complex quantum algorithms.-----The quantum hardware ecosystem is currently bifurcated by the challenge of maintaining coherence and achieving high-density integration, especially in control electronics. Silicon quantum dots offer a scalable platform, benefiting from mature CMOS fabrication capabilities, but this advantage is negated if the requisite control and measurement infrastructure consumes prohibitive power or generates excess heat, destabilizing the cryogenic environment. This is the central technical constraint this role is designed to mitigate. Parametric circuits, such as Josephson Parametric Amplifiers (JPAs) or Traveling Wave Parametric Amplifiers (TWPAs), are vital components in the quantum measurement stack, enabling high-fidelity, quantum-limited signal readout. The transition from discrete, high-power control systems to integrated, ultra-low-power devices represents a critical technology readiness level (TRL) bottleneck. The current vendor landscape for these specialized cryogenic electronics is thin, necessitating in-house expertise to de-risk the hardware roadmap. This engineer's focus on non-linear reactive elements in silicon quantum dots and thin-film superconductors targets the energy efficiency gap in the control plane, pushing the entire silicon quantum modality toward practical fault-tolerant computation. Failure to optimize power consumption at the I/O layer fundamentally limits the maximum size and complexity of the quantum chip that can be housed and operated within a standard dilution refrigerator.-----The Technical Skill Architecture centers on the mastery of high-frequency electronics design for extreme operating environments. Domain expertise in quantum-limited amplification (e.g., JPA/TWPA development) directly enables the high signal-to-noise ratio required for rapid, non-destructive qubit measurement throughput. Proficiency in high-frequency Electronic Design Automation (EDA) toolchains—specifically Keysight ADS, Ansys HFSS, and CST Microwave Studio—is necessary for rigorous electromagnetic and thermal co-simulation of devices operating near the quantum limit. This toolchain mastery ensures that parametric circuit designs are thermally stable and electrically optimized before fabrication, accelerating the design-test-validate cycle. Knowledge of low-level data acquisition software, primarily Python, bridges the gap between cryogenic hardware operation and data interpretation, establishing the automated workflows necessary for complex experimental control and validation of parametric device performance against theoretical models. The ultimate engineering outcome is the stabilization of large-scale qubit operation through minimized thermal load and optimized signal fidelity.----- * Reduces the quiescent power consumption threshold for quantum control electronics, supporting higher qubit counts.
* Establishes proven methodologies for integrating ultra-low-power microwave components directly into the cryogenic package.
* De-risks the roadmap for deploying quantum error correction codes by ensuring reliable, high-fidelity state readout.
* Advances the technology readiness level of semiconductor-based quantum computing platforms.
* Contributes to the development of novel parametric devices utilizing quantum capacitance phenomena in silicon nanostructures.
* Provides critical feedback loops to nanofabrication teams, optimizing material science for thin-film superconductors and quantum dots.
* Drives intellectual property generation in the foundational layer of quantum computer I/O and control.
* Increases the data throughput and efficiency of deep cryogenic measurement campaigns.
* Fosters interdisciplinary convergence between semiconductor physics, RF engineering, and quantum information science.
* Strengthens the European quantum technology supply chain by developing proprietary control solutions.-----Industry Tags: Silicon Quantum Computing, Parametric Amplification, Cryogenic RF Electronics, Quantum Capacitance, Kinetic Inductance, Qubit Control, Quantum-Limited Measurement, Deep Cryogenics, High-Frequency EDA, Quantum Hardware Integration
Keywords: Senior Quantum Engineer, Parametric Circuits jobs, Silicon Qubit control, ultra-low-power quantum electronics, Josephson Parametric Amplifier development, TWPA design, cryogenic microwave engineering career, quantum dot readout, high-frequency electronic simulation, quantum hardware scale-up, San Sebastián quantum jobs, ERC CoG QuDos project
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