Expert Quantum Physicist, Simulation at Alice & Bob (Paris)
Job Description
Alice & Bob is hiring an Expert Quantum Physicist for its EDA (electronic design automation) research team in Paris, to own the accuracy and reliability of the simulation stack used to design its superconducting cat-qubit chips, from device physics to numerical code.
At a glance
- Role: Expert Quantum Physicist (EDA research)
- Where: Paris, France
- Contract: CDI (permanent)
- Experience: 7+ years after a PhD, in academia or industry
- Apply: open until filled (re-checked 11 October 2026)
About the simulation physicist role
- Own the predictive performance of the simulation stack end to end: accuracy, reliability and efficiency
- Define what a trustworthy result means across microwave, quantum and numerical simulations, including accuracy, convergence and validation practice
- Find and remove what holds the stack back, whether speed, robustness or model fidelity
- Shape the roadmap for simulation tools with experts across the company
- Validate simulations against measured devices alongside experimentalists, and be the team’s authority on simulation method
Cat qubits store information in two coherent states of a microwave resonator, stabilised by engineered two-photon dissipation. That makes bit-flip errors extremely rare, so the remaining phase-flip errors can be handled with simpler codes, such as a repetition code. Roles at Alice & Bob are built around making that architecture work at scale.
The posting describes a staged hiring process: a screening call, an interview with the hiring manager, a technical session with the team and a technical presentation.
What Alice & Bob is looking for
- A PhD or equivalent in quantum physics, applied physics, electrical engineering, quantum information or computational physics, and 7+ years of experience since
- Technical leadership that shaped simulation or modelling practice and fed into device design
- Deep experience simulating superconducting qubits or similar systems: finite-element tools (such as Ansys HFSS, COMSOL or Palace) and circuit quantisation
- Command of circuit QED, Hamiltonian modelling, open quantum systems and decoherence, plus microwave engineering for quantum devices
- Strong scientific software skills in Python, NumPy/SciPy or JAX, and Git, and a record of mentoring senior colleagues
Nice to have
- HPC or large-scale simulation experience
- Publications in circuit QED or computational electromagnetics
- Hands-on experimental research with quantum devices
Pay and location
Alice & Bob’s posting does not state a salary. The role is a CDI (permanent contract) based in Paris.
How to apply
Apply through the official Alice & Bob job posting. Alice & Bob’s posting does not give a closing date, so the role is open until filled; ResearchJobs.in will re-check this listing on 11 October 2026. Check the posting for location and work-authorisation details before you apply.
See all our quantum technology jobs, or browse more research jobs on ResearchJobs.in.
Hiring institution: Alice & Bob
Official advertisement: jobs.lever.co
How to prepare for this application
- Electromagnetic to quantum: explain how you get from a finite-element model to a circuit Hamiltonian, for example with energy-participation or black-box quantisation.
- Convergence and trust: prepare examples of how you proved a simulation had converged and where models disagreed with measurement.
- Microwave parts: revise resonators, filters, couplers and parametric amplifiers in quantum circuits.
- Technical presentation: the process includes one; choose a project that shows judgment as well as technique.
- Leadership: have a story of building agreement between specialists who disagreed.
About Alice & Bob
Alice & Bob is a French company developing a universal, fault-tolerant quantum computer. Its approach uses a new kind of superconducting qubit, the Schrödinger cat qubit, which can correct some errors autonomously, so less hardware is needed for error correction than on other superconducting platforms. The company has more than 250 people from over 35 countries.
