Test and Characterization Engineer H/F

Alice&Bob is developing a quantum computer based on cat qubits. While initially running nanofabrication processes in academic cleanrooms, Alice&Bob now has its own prototyping cleanroom in Ile de France. This facility will allow to:

• Speed up the design iteration cycle, by reducing the leadtime of chip fabrication
• Improve the capability of Alice&Bob nanofabrication processes (improving performance and mastering 3D integration)

As part of the Quantum Hardware department, the “Nanofabrication Backend” team will play a pivotal role in operating and developing the “backend of line” used for manufacturing Alice&Bob Quantum Processor. Technically, this encompasses:

• Room temperature electrical testing
• Dicing
• Optical inspection
• Wirebonding of chips inside sample holders

The team is in charge of:

• operating the tools for the regular delivery of test chips
• developing/improving new processes (for better quality/leadtime/chip selection…)
• overseeing its own tools (daily check of the tools, ensuring maintenance schedules are followed, 1 level of troubleshooting)
• selection, installation and qualification of new tools

Responsabilities

About the Role

As a Test & Characterization Engineerwithin the Nanofabrication Backend Team, you will play a critical role in validating our fabrication processes, ensuring data reliability, and developing innovative testing methodologies for superconducting qubits. You will contribute to improving wafer and chip performance through rigorous device testing, robust metrology, and collaborative problem-solving across teams.

• Develop and optimize superconducting qubit testing methods at room and cryogenic temperatures, providing fast feedback to nanofabrication processes and ensuring efficient sorting of chips.
• Collaborate with design and process integration teams to define and evaluate test structures that improve wafer- and chip-level performance.
• Ensure accuracy and reliability of equipment metrology, data acquisition systems and inspection equipment.
• Contribute to the identification, procurement, and validation of new test and metrology equipment for the backend nanofabrication line.
• Implement continuous improvement plans to enhance testing efficiency, reliability, and throughput.
• Perform device testing at room and cryogenic temperatures, ensuring accurate and reproducible results.
• Participate in failure analysis and root cause investigations, helping to close the loop between design, fabrication, and performance.

Requirements

• Master’s degree or Ph.D. in Physics, Electrical Engineering, Materials Science, or a related field.
• 3+ years of hands-on experience with device testing, electrical measurements, or semiconductor/metrology equipment.
• Familiarity with superconducting devices or cryogenic measurements is a strong plus.
• Proficiency with data acquisition systems, lab instrumentation, and analysis tools (e.g., LabVIEW, Python, MATLAB, JMP).
• Strong problem-solving mindset, analytical rigor, and attention to detail.
• Ability to work collaboratively in a fast-paced, cross-disciplinary environment.
• Languages: Proficient in English; French is a plus

Localization of the position:

• In Aubervilliers