Nanoassembly engineer
C12 Quantum Electronics
Paris, France
Posted on Mar 6, 2025
C12 develops quantum computers, to solve highly complex computing tasks, currently out of reach of even the most powerful supercomputers. Building a quantum computer still needs innovators ready to tackle exciting challenges. C12’s founders are convinced that only a new material for the qubit will bring a technological breakthrough. C12 uniquely uses carbon nanotubes as the fundamental building blocks of its quantum processor. This high-purity material minimises errors, radically improves performance and reduces hardware overhead for fault-tolerant computing. Combined with well-established semiconductor techniques, carbon nanotubes will help scale quantum computing, just as silicon revolutionised classical computing.
Our unique & innovative quantum computing technology enables us to address use cases, solving intractable problems our industrial customers are facing.
Founded in 2020, C12 is a fast-growing start-up, who recently raised EUR 18 million in 2024 to further its research in its own lab in the heart of Paris (Panthéon).
Your role at C12 Quantum Electronics
- As part of the nanoassembly team at C12, you will be operate and develop a custom nanoassembly apparatus to integrate ultra-pure carbon nanotubes with microchips to create qubits.
- Operate a custom-built nanoassembly apparatus in a homemade ISO7 clean room
- Develop the Python-based custom control software to enhance throughput and automation
- Probe and optically inspect microchips (probe station, SEM)
- Electrically characterise quantum devices
- Analyse, summarise, and present data
In collaboration with other scientists you will:
About you
- Required Qualifications
- At least a Master in Embedded systems engineering, Robotics, Electrical engineering, Physics, Applied Physics, Materials Science or other related field
- Good understanding of proper software development practices, Python language, and version control systems
- Basic knowledge of micro electronics and low current measurements
- Get-things-done attitude
- Problem solving and creativity
- Ability to distil and communicate scientific information effectively with the wider team
- Good communication in English (oral and written)
- Preferred Qualifications
- Experience in 3D design software
- Experience in semiconductors
- Experience with high vacuum systems
- Experience in carbon nanotubes
You should join us if...
You want to contribute to achieve landmark results in quantum computing and participate in setting up the world-first architecture of a five-qubit chip with all-to-all connectivity between spin qubits, making a difference in the emerging quantum technologies
You want to work within a 50-people team with various backgrounds in physics, chemistry, mechanical engineering, electrical engineering and software engineering to create a revolutionary quantum computing processor
You want to thrive in an exceptional scientific environment with several industrial and academic partners.
You share our values (excellence, scientific integrity, diversity, curiosity, and care) and want to help us define our product-focused culture and ambition to accelerate.
C12’s unique technology
At C12, a qubit, the fundamental functional unit of a quantum computer, is built from an isotopically ultra-pure 12C nanotube suspended above a silicon chip containing control electrodes and a quantum communication bus. Our spin qubits hold great promise in terms of individual control and manipulation as well as for the circuit architecture. A suspended isotopically-pure 12C nanotube holds great promise in terms of stability, as it reduces all sources of decoherence (charge noise, nuclear spin noise and phonon relaxation).
C12 encourages all who feel qualified to apply. Recruitment decisions are based solely on qualifications, skills, knowledge and experience. Applications from women are particularly welcomed.