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C12
Senior Software Engineer

Senior Software Engineer

Hybrid

Paris, France

Full Time

01-05-2025

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Job Specifications

C12 Quantum Electronics develops reliable & application-specific quantum computers, to solve highly complex computing tasks, currently out of reach of even 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 Quantum Electronics uniquely uses carbon nanotubes as the fundamental building blocks of its quantum processor. This high-purity material minimizes 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 revolutionized classical computing.

Founded in 2020, C12 Quantum Electronics is a fast-growing start-up that recently raised EUR 18 million in 2024 to further its research in its own lab in the heart of Paris (Panthéon).

Your role in C12 Quantum Electronics

Our software development team is looking for a new Software Engineer to join our growing team! Working under the supervision of our Head of Software Development, you will:
Assist and facilitate the projects of our research teams towards building a quantum computer
Collaborate with our multi-disciplinary R&D teams on the following projects:
- HTTP APIs, REST & GraphQL
- Hardware orchestration
- QPU emulation
- Data analysis & automation
Collaborate with our scientists and engineers, acting as a problem solver; finding and implementing the best tools
Can adapt and implement new languages / frameworks / apis

About You

You have 5+ years of experience in software development
You have been working with python, typescript and other languages are welcome
Hardware / embedded software development is a big plus
Machine learning -> Deep learning experience is a big plus
Physics background during studies or previous work experience is a plus
You are curious and are interested in adapting to new frameworks and languages
You have an interest in new technologies such as quantum computing
You have a good command of English (verbal and written)

You should join us if...

You want to contribute to achieve landmark results in quantum computing, making a difference in the emerging quantum technologies.

You want to work within a 50-people team with various backgrounds in nanofabrication, quantum electronics and carbon nanotube science to materialize our vision of a revolutionary quantum computing processor.

You want to thrive in an exceptional scientific environment with several industrial and academic partners.

You relate to our values (excellence, scientific integrity, diversity, curiosity and care) and want to help us define our product-focus culture and ambition to accelerate.

C12 Quantum Electronics’ unique technology

At C12 Quantum Electronics, 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 promises in terms of individual control and manipulation as well as for the circuit architecture. A suspended isotopically pure 12C nanotube holds great promises in terms of stability, as it reduces all sources of decoherence (charge noise, nuclear spin noise, phonon relaxation).

C12 Quantum Electronics encourages all who feel qualified to apply. Recruitment decisions are based solely on qualifications, skills, knowledge and experience. Applications from women are particularly welcomed.

About the Company

C12 is building useful quantum computers by crafting the highest quality qubits using ultra-pure materials and perfected processes to control every individual electron. Launched in 2020 by twin brothers Matthieu and Pierre Desjardins, C12 is a spin-off of the Physics Laboratory at the Ecole Normale Superieure in Paris. We are pioneering a new approach to quantum computing--using carbon nanotubes to create ultra-pure qubits, enabling better control, reduced noise, and a scalable hardware platform. In June 2024, we raised EU... Know more