Senior Experimental Quantum Physicist

C12 Quantum Electronics is developing a hybrid quantum architecture based on spin qubits in carbon nanotubes, coupled through a circuit quantum electrodynamics (cQED) platform. Our approach combines the exceptional coherence properties of carbon-based qubits with high-connectivity microwave architectures, with the goal of building a fault-tolerant quantum processing unit.

The Qubit Control team sits at the heart of this effort. We develop the methods that make qubits work: tuning protocols, readout strategies, gate implementations. We optimise the control and readout electronics and protocols, explore large parameter spaces, investigate the physics of the spin qubit, and translate physical insight into engineering solutions.

Working at the intersection of quantum physics, engineering, and software, you will collaborate daily with theory and the other engineering teams — all co-located in our Paris lab to make those interactions as direct and continuous as possible.

A company at an inflection point: C12 is transitioning from a phase of scientific discovery and proof-of-concept demonstrations to one of systematic scaling. This means our focus is shifting towards automation, reproducibility, and process maturity — without sacrificing the scientific rigor and curiosity that got us here. It is a demanding and exciting moment: we are still making new science, while simultaneously building the infrastructure that will carry us to a quantum advantage demonstration. The person joining this team will need to be both a rigorous scientist and a pragmatic builder.