Quantum Scientist

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, and we are 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

About the role

The Performance Optimization team aims at using advanced ML & Optimization tools to improve the performance of Alice & Bob's quantum processors.

As a Quantum Scientist - Device Theory, your role will be to refine theoretical models of Alice & Bob's cat qubits, to contribute to the development of efficient numerical methods to study cat qubits dynamics, and to integrate these models and numerical methods in the firmware platform operating Alice & Bob's processors. Working with a multidisciplinary team of physicists and engineers, you will apply your theoretical knowledge of superconducting circuits to solve tangible challenges in quantum computing.

• Develop theoretical models of Alice & Bob's dissipative cat qubits implemented with superconducting circuits
• Create efficient numerical methods to study the dynamics of our systems
• Collaborate with quantum experimentalists, machine learning research scientists, and engineers to analyse and understand the experimental data
• Contribute to the development of machine learning methods to optimise the performance of the devices

• PhD in quantum physics, focused on the theory of superconducting devices
• Publications of device theory papers in top-tier physics journals as a lead author
• Expertise in modern numerical & analytical tools for modelling superconducting circuits
• Proficiency in Python programming
• Excellent communication and collaboration skills, with the ability to work effectively in a cross-functional team environment
• Professional-level English proficiency, both written and spoken

• Curiosity about machine learning
• A strong sense of ownership and attention to detail, ensuring that projects are delivered with quality and completeness

• 25-day vacation policy (as per French law) + RTT
• Half of transportation cost coverage (as per French law), or yearly allowance for bike enthusiasts
• Competitive health benefits with Helium/AXA
• Meal vouchers with Swile, as well as access to a fully equipped kitchen
• Parental benefits with crèche support
• Flexible remote policy, up to 40 % a month
• Language courses covered by the company
• Mental health support with
• Subsidized membership with Urban Sports Club

• Screening Call with Grace, Talent Acquisition Specialist min)
• Hiring Manager Interview with Jérémie, VP Firmware (45 min)
• Technical Interview/Presentation with the Team (60 min)
• Leadership/Fit Interview (45 min)
• Reference check

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.