Quantum Measurement Engineer - QPU Diagnostics & Calibration

About the role

The Quantum Measurement Engineer - QPU Diagnostics & Calibration owns the end-to-end experimental validation of Quantware's quantum processors, designing and executing measurement campaigns that directly inform hardware decisions. You will architect advanced diagnostic routines that isolate loss mechanisms, quantify crosstalk, and budget gate errors across development prototypes and production QPUs using Quantware's VIO™ architecture. This role requires you to translate abstract performance targets into concrete measurement strategies, iterating quickly to surface the most impactful hardware improvements. You will work at the heart of the Quantum Processor team, coordinating with QPU Design, Measurement, and Software Engineers to ensure that experimental learnings are rapidly integrated into device layouts and control electronics. Every experiment you run will be framed by a clear hypothesis, and you will be responsible for driving that hypothesis from initial concept through to a documented performance outcome. You will build the narrative of each measurement campaign, explaining not just the what but the why behind every observed performance shift. Ultimately, your work will define the empirical boundary conditions within which our next-generation quantum processors are designed and scaled.

Key facts

What you'll do

Design and implement advanced measurement protocols that elevate quantum gate and readout fidelities while diagnosing the dominant noise sources limiting current prototypes.

Execute a structured experimental program that compares design variations, coupling schemes, and filtering strategies to isolate the performance impact of each architectural change.

Analyze complex measurement datasets using Python, transforming raw cryogenic data into actionable insights that clearly communicate performance trends and anomalies.

Lead ownership of measurement campaigns, coordinating cooldown schedules, data acquisition, and analysis to ensure timely delivery of high-confidence results.

Collaborate closely with QPU Design Engineers to translate device-level observations into concrete layout and component recommendations that reduce crosstalk and improve signal integrity.

Develop and maintain diagnostics tooling, including noise spectroscopy and gate error budgeting frameworks, that continuously inform performance optimization priorities.

Partner with Measurement and Software Engineers to integrate diagnostic results into automated calibration workflows, closing the loop between characterization and firmware updates.

Continuously benchmark new design elements against established baselines, documenting improvements and regressions with rigorous, reproducible methods.

Communicate findings to cross-functional teams through clear reports and discussions, ensuring that experimental outcomes directly influence the next iteration of quantum processor development.

Champion a culture of data-driven decision-making, where every conclusion is backed by quantified evidence and transparent uncertainty analysis.

Requirements

Bring a minimum of 5 years of hands-on experience performing cryogenic measurements on multi-qubit superconducting quantum processors in a research or industry setting.

Demonstrate a proven track record of diagnosing performance-limiting mechanisms in superconducting qubit devices, including flux noise, quasiparticle poisoning, and dielectric loss.

Show deep familiarity with circuit quantum electrodynamics (cQED), superconducting device behavior, and signal integrity challenges at the cryogenic temperatures used in multi-chip modules.

Exhibit strong programming skills in Python, with practical experience in data analysis, visualization, and experiment control frameworks common to quantum measurement workflows.

Display a proactive, detail-oriented mindset and a strong drive to scale quantum technology, balancing rigorous analysis with a bias toward rapid iteration.

Thrive in a highly collaborative environment, communicating clearly with hardware engineers, software developers, and project stakeholders across disciplines.

Comfortably take ownership of measurement campaigns from initial planning through final reporting, using structured documentation to ensure continuity and reproducibility.

Align with Quantware's mission of pushing the edge of what is currently possible, embracing challenging problems that require creative experimental thinking and persistence.

Nice to have

Experience with VIO™-specific control and measurement frameworks, or familiarity with custom parametric amplifier readouts at the single-shot level.

Background in developing automated calibration routines or machine learning tools that support quantum device tuning in a multi-user environment.

Practical notes

This role is based in Delft and operates on a full-time engagement with flexible hybrid working arrangements coordinated through internal trust-based policies. No specific working hours are mandated beyond standard team coordination needs. Travel is generally limited to within the Netherlands and European partner sites for collaboration and measurement campaigns, with any international travel handled through standard corporate processes. Candidates from diverse backgrounds and non-traditional career paths are strongly encouraged to apply, and pre-employment screening may be required as part of our recruitment process.