Material Science Intern

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 minimises hardware overhead—key ingredients for scalable, fault-tolerant quantum computing. By crafting a unique approach that scales, we aim to revolutionise 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 60, including 20 PhDs, has over 20 nationalities represented. We have our own cutting-edge lab space 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.

Your role at C12 Quantum Electronics:
• As a Material Science intern working on carbon nanotubes (CNT), you will work closely with Jean-Loïs and Louis, our CNT Research Engineers. Your main responsibilities include:
• Designing an experimental protocol to assess the influence of the Chemical Vapour Deposition (CVD) parameters on the growth of carbon nanotubes - e.g. geometry, density of catalyst nanoparticles, position in the furnace - and on the overall performances of the CVD
• Collaborating with the Characterization and Nanofabrication teams to characterize the catalyst nanoparticles and to determine the properties of the grown carbon nanotubes
• Analysing experimental data to draw conclusions on the phenomena involved
• Getting familiar with the CVD setup, C12 processes and characterization equipments - e.g. SEM, EDX, AFM, possibly setting up a mass spectrometer

About you::
• You are pursuing a Master’s degree in engineering, physics, chemistry or any related field and are looking for an end-of-studies internship
• You love experimental lab work, have a problem-solving attitude - a previous experience in a lab is a plus
• You are used to collecting, organising and analysing experimental data - programming skills are a plus (e.g. python)
• You are result-oriented, organised, and rigorous in your documentation
• You can fluently communicate in English (verbal and written)

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 60-people team 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.

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.