Founded in 2020 and based in the heart of Paris, C12’s mission is to be at the center of one of the biggest technological breakthroughs of the century and change the course of history by building a universal quantum computer.

At C12, we believe that achieving a true breakthrough in quantum computing requires rethinking the fundamentals. That’s why our founders—deeply rooted in academic and engineering excellence—have chosen carbon nanotubes as the building blocks of our quantum processors. This ultra-pure material dramatically reduces error rates, boosts performance, and minimizes hardware overhead—key ingredients for scalable, fault-tolerant quantum computing. By crafting a unique approach that scales, we aim to revolutionize quantum computing just as silicon transformed classical computing.

Since our founding, we’ve raised over €25 million in funding, published 11 scientific papers, and secured 8 patents. Today, our fast-growing team of 80+, including 25 PhDs, has over 26 nationalities represented. We have our own cutting-edge lab spaces in Paris' historic Panthéon district, where scientists, engineers, and innovators work side-by-side to tackle some of the most exciting technical challenges of our time.

If you're passionate about shaping the future of quantum technology and want to make a real impact, C12 offers a unique environment to grow, learn, and innovate.

Your role at C12 Quantum Electronics:

As part of the Carbon NanoTube (CNT) Engineering team at C12, you will support the teams which produce, characterize and manipulate the carbon nanotubes and help ensure smooth, safe and reliable day-to-day lab operations. Your job will involve:

Supporting daily lab operations across the CNT engineering team: loading/unloading equipments, manipulating samples between teams

Maintaining lab equipments : routine checks, basic maintenance and troubleshooting

Managing lab consumables and spare parts: inventory tracking, ordering and storage

Ensuring proper labeling, documentation and organization of samples and lab spaces

About you:

You have a technical degree (BTS, DUT, Bachelor’s or equivalent) in physics, electronics, materials science, chemistry or a related field

You love experimental lab work and have hands-on experience in a technical environment

You are comfortable exchanging with external partners and suppliers

You are detail-oriented and well organized in your work

You communicate easily in English (verbal and written)

Preferred traits

Experience in materials characterization techniques (e.g. SEM, probe station).

Experience with small electronics and mechanical parts

Experience with vacuum / gas systems

Experience in stock management

You should join us if...

You like hands-on work and technology

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

You want to work within a team of 80+ people with various backgrounds in nanofabrication, quantum electronics, and carbon nanotube science 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

We still encourage even if you don’t meet all the requirements. Rest assured, we are committed to finding the right fit for our team and are open to adjusting compensations based on skills and experiences.

Applications from women are especially welcomed!