Scientific Computational Engineer
Alice & Bob
Paris, France
Posted on Nov 15, 2025
Alice & Bob is a rapidly growing deeptech company going through the R&D stage to shape the future of Quantum computing. A diverse team of brilliant minds from over 20 countries, we're on a mission to revolutionize technology and benefit humanity by building the first universal, fault-tolerant quantum computer with a new kind of superconducting qubit: the Schrödinger cat qubit.
While we're dedicated to our work, we also value a fun and collaborative culture.
Are you ready to join us on this groundbreaking journey? Join us today!
The inherently hardware-intensive nature of our quantum chip design amplifies the need for fast, high-fidelity, and scalable simulations across the entire stack, to de-risk, compress R&D cycles and optimize what to build next. If you’re excited to turn cutting-edge numerical methods into production-grade tools that move qubits from concept to cryostat, you’ll thrive here!
About the role
As a Scientific Computational Engineer reporting to the Simulation Engine team lead, you will design, implement, optimise, and maintain the numerical methods, simulation tools and HPC pipelines that power our quantum chip design workflow. You’ll collaborate closely with quantum theorists, experimentalists, and simulation engineers to model complex physical phenomena and translate research ideas into robust and performant tools used daily across the company.
Responsibilities
- Collaborate with cross-disciplinary teams to translate research ideas and needs into SOTA scientific computing methods and simulation tools, emphasising differentiability, GPU-acceleration and uncertainty-awareness.
- Design, implement, optimise and validate algorithms and numerical methods for quantum and classical physics simulations.
- Take ownership of implementing new functionalities into the simulation workflow.
- Benchmark and compare methods/tools.
- Document, maintain, and publish all developed methodologies and supporting tools.
Requirements
- PhD or 3+ years in applied mathematics, scientific computing, numerical physics, or related fields.
- Experience with PDE discretization, ODE integrators and direct/iterative linear solvers.
- Demonstrated HPC skills: parallel/distributed programming and GPU acceleration.
- Proficiency in Python and differentiable programming with JAX.
- Experience with software development and best practices.
- Ability to follow up current academic research on scientific computing.
- Professional-level English proficiency, both written and spoken.
Nice to Have
- Background in electromagnetism, superconducting circuits or quantum physics.
- Experience in surrogate modeling, reduced-order models and SciML.
- Prior knowledge or experience with UQ & sensitivity analysis.
Benefits
- Our success is your success : own it with our BSPCE plan
- Direct IP Compensation: Earn substantial bonuses for driving the core patents that define our quantum architecture.
- 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 under 12 years old children
- 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
- French language courses covered by the company for those interested
Recruitment Process
- Screening Call with Grace, Talent Acquisition Specialist (30 min)
- Hiring Manager Interview with Matthieu (45 min)
- Technical Interview/Presentation with the team (60 min)
- Leadership & Fit Interview (60 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.