Senior Quantum Experimentalist for Cat-Qubit Environment Optimization

Research – Experimental /
Alice&Bob is developing the first universal, fault-tolerant quantum computer to solve the world’s hardest problems. The quantum computer we envision building is based on a new kind of superconducting qubit: the Schrödinger cat qubit. In comparison to other superconducting platforms, 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. We are growing fast, securing 30 million USD of funding in 2022 to develop our unique technology. We are 80 and counting, between physicists, PhDs, engineers and experienced business professionals, all united in reaching our ambitious goal. If you are an explorer, craving to challenge yourself and make quantum computing come true, come and join us!

We are recruiting this specialist as mastering the environment seen by superconducting quantum circuits is crucial to realize high-fidelity operations, especially as the system size scales up.

Your work will be at the crossroad of quantum physics of cat qubits, microwave engineering, nanofabrication, cryogenics, and control electronics, giving you the opportunity to collaborate closely with many different teams.


    • Design and conduct experiments identifying, quantifying, and mitigating the impact of the different environmental noise sources on the performances of cat-qubit quantum processors.
    • The scope of your work will range from the chip level (e.g. TLS, non-thermal photons, out-of-equilibrium quasiparticles, high-energy events) up to the lab level (e.g. electromagnetic noise, vibration noise, control electronics imperfections).
    • You will setup an exhaustive monitoring of the quantum circuit environment to correlate noise sources and cat-qubit performances.


    • We are looking for scientists with 4+ years of experience in the field of superconducting quantum circuits, and strong skills in:
    • Microwave control and measurement of superconducting quantum circuits
    • Experimental techniques of superconducting quantum circuits
    • Quantum circuit design and fabrication
    • Python coding, in particular to develop automation routines
    • Data analysis and comparison to theory
    • Oral and written reporting


    • 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 benefits with Alan
    • Meal vouchers with Swile, as well as access to a fully equipped kitchen
    • Parental benefits with crèche support
    • Flexible remote policy, up to 25 % a month.

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 of 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.