Alice & Bob is developing the first universal, fault‑tolerant quantum computer to solve the world’s hardest problems. The quantum computer we envision is based on a new kind of superconducting qubit: the Schrödinger cat qubit. Cat qubits have the astonishing ability to implement quantum error correction autonomously! We are at the forefront of the quantum race, competing with tech giants such as Google or IBM, and growing fast after securing €100 million of funding in 2025 to develop our unique technology.
Currently 100+ and counting, between physicists, PhD students, engineers and experienced business professionals, we are united to reach our ambitious goal. Are you a quantum pioneer? Join us on a mission to reshape the future!
While initially running nanofabrication processes in academic cleanrooms, Alice & Bob is stepping up by building its own prototyping cleanroom in Ile de France (construction started, start of operation beginning 2026). 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 the line” used for manufacturing Alice & Bob Quantum Processors. 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

Test & Characterization Engineer
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.
Responsibilities

Develop and optimize superconducting qubit testing methods at room temperature, 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 temperature, 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

Benefits

Our success is your success: own it with our BSPCE plan
Turn your ideas into patents – and competitive patent bonuses
Flexible remote policy, up to 40 % a month
A parental plan including additional benefits such as crèche support or additional days‑off to take care of children under 12 years old
Subsidized membership with Urban Sports Club
Mental health support with moka.care
25‑day vacation policy (as per French law) + RTT
Half of transportation cost coverage (as per French law), or yearly allowance for the die‑hard bicycle users
Competitive health coverage, with Helium / AxA
Meal vouchers with Swile, as well as access to a fully equipped and regularly stocked kitchen

Recruitment process

Screening Call with Giusy, Talent Acquisition Specialist (30 min)
Hiring Manager Interview with the Hiring Manager (45 min)
Technical Interview/Presentation with the Team (60 min)
Leadership and Fit Interview (45 min)

Research shows that women might feel hesitant to apply for this job if they don't match 100% of the job requirements listed. This list is a guide, and we'd love to receive your application even if you think you're only a partial match. We are looking to build teams that innovate, not just tick boxes on a job spec.
You will join one of the most innovative startups in France at an early stage, to be part of a passionate and friendly team on its mission to build the first universal quantum computer! We love to share and learn from one another, so you will be certain to innovate, develop new ideas, and have the space to grow.
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