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Superconducting Qubit Design Engineer

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!
As a Superconducting Qubit Design Engineer, you will be part of the development of our new, cutting-edge microwave architecture embedding the superconducting resonators, and specifically designed to preserve and control their quantum states.
Your mission will be to develop, simulate and troubleshoot microwave circuits and their controls. You will work hand in hand with the experimental physicists building the quantum processor and develop state-of-the-art hardware to control and design an ever more complex system.


    • Numerical simulations for the on-chip circuit and its packaging
    • Accurate prediction of interface losses
    • Accurate prediction of inter resonator couplings
    • Design, development and troubleshoot of room temperature hardware (filters, PCBs, etc.)
    • Design of the architecture of the upcoming multi-qubits circuits


    • An MSc or PhD degree in electrical/microwave engineering or related subject
    • 5 years of relevant experience
    • Experience with EDA software Ansys HFSS
    • Experience in Python programming
    • Experience with PCB layout software
    • Strong knowledge in transmission line theory and wave propagation
    • Knowledge on passive and active RF/MW components
    • Experience in cryogenics and/or quantum mechanics


    • 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.