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!
As a Mid-Senior Quantum Experimentalist at Alice & Bob, you will be at the frontline of our cutting-edge cat-qubit processors. In essence, your role will be to drive improvements and innovations of our processors to keep pushing the state-of-the-art with cat qubits. You will be in charge of measuring, characterizing, and optimizing our quantum circuits and gates using state-of-the-art techniques. You'll play a pivotal role in improving our experimental setup and tools, driving advancements that enhance the performance of our cat-qubit processors. You will have the opportunity to work together with other top-level teams internally and represent scientific research of the company externally. Your work will directly contribute to define the experimental roadmap of the company.
As a member of the Firmware department you will be directly working on our main QPUs with the mission to automatize its calibrations and extract the maximum performance out of it.
Responsibilities
- Measure, characterize in-depth, and fine tune quantum circuits and quantum gates
- Carry in-depth analysis of the data to improve theoretical models
- Drive new circuit / gate designs and measurement methods from ideas to experimental validation and integration in cat-qubit quantum processors
- Contribute to the improvement of the experimental setups and tools
- Contribute to the expansion of the knowledge base of Alice & Bob and the continuous training of experimentalists
- Report on experimental results internally and externally
- Manage external collaborations
Requirements:
- We are looking for PhD or postdoc level scientists with 3+ years of experience of experimental work in quantum mechanics, preferably in the field of superconducting quantum circuits
- Microwave control and measurement of superconducting quantum circuits
- Data analysis and comparison to theory or numerical simulations (preferably with Python)
- Circuit design and simulation
- Quantum gate design and benchmarking
- Quantum error correction protocols
- Scientific writing
You should have strong skills in
Benefits:
- 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 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 moka.care
- Subsidized membership with Urban Sports Club
Recruitment Process
- Screening Call with Sabrina (30 min)
- Hiring Manager Interview with Nathanael (45 min)
- Technical Interview/Presentation with the Team (60 min)
- Fit Interview (45 min)
- Founders/C-level Interview (30 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.
Top Skills
What We Do
Founded in 2020, Alice & Bob secured $30 M funding in Series A.
Today, we're recognized as one of the leaders in Quantum Computing.
Our cat qubits are error corrected by design, reducing hardware requirements by up to 200 times compared to other platforms enabling fault-tolerant quantum computing at scale.
Our headquarters is located in Paris, with offices in Boston, MA.
We are 80+ smart and dedicated innovators, coming from 17+ countries and growing by the day. We are committed to one mission: build a useful quantum computer.
Check open positions: bit.ly/joinusatAB
