Senior Nanoscience Engineer

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 our 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 includes 55+ people, with 20+ PhDs and over 20 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 nano-assembly team at C12, you will be at the very heart of the creation of our single-molecule qubit devices.

**Your key responsibilities**:

- Operate and optimise our high-vacuum nano-assembly setups to transfer ultra-pure carbon nanotubes onto custom-made microchips
- Design and validate experimental protocols to improve the yield and performance of our quantum devices
- Characterise and condition the microchips for nano-assembly (SEM, optical microscope, wire bonding, plasma cleaning, etc.)
- Collaborate with the software team to improve the control software, as well as organise, analyse and report on your experimental results
- Be involved in the design and setup of new experimental vacuum setups

**About you**:

- You hold a PhD in Physics, Nanotechnology, Electrical Engineering, Materials Science or a related field, or you have equivalent experience in an industrial or startup setting. Further postdoctoral or work experience is a plus
- You have experience in hardware and experimental setup design and fabrication
- You love experimental lab work, have a problem-solving attitude and can handle parallel research projects
- You are used to collecting, organising and analysing experimental data. Programming skills are a plus.
- You are result-oriented, organised, and rigorous in your documentation
- You can fluently communicate in English (verbal and written)

**Preferred experience**
- Experience with high-vacuum systems and embedded electronics
- Experience in materials characterization techniques (SEM, TEM, AFM, electrical characterisation,..)
- Experience in semiconductor physics and/or nanomaterials.
- Experience with quantum devices or carbon nanotubes

**What we offer**:

- Flexible rhythm of remote work
- Stock options for every employee (BSPCE/ESOP)
- Two incredible office spaces in the heart of Paris (both next to the famous Panthéon)
- Sponsored trip to conferences around the world
- A highly dynamic international team
- Swile meal vouchers
- Breakfast for all every Friday
- Mental health support with moka.care
- Training budgets/ Annual Learning & Development Allowance
- Sabbatical leave (after 2 years in the company)

**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 55-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.