Research Engineer in Nanoscience
Paris, France
Posted on Aug 18, 2026
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 :
- Operate and continuously improve the nano-assembly vacuum setup
- Design and validate experimental protocols to optimise the success rate of the nano-assembly (including mechanical, electrical and chemical processes).
- Optically inspect, clean and characterize silicon chips (probe station, SEM...)
- Work with the software team to improve the control software and the storage and analysis of your data in our internal database
As part of the nanoassembly team at C12, you will help develop and operate the custom nano-assembly vacuum setup to transfer ultra-pure carbon nanotubes onto microchips in order to create qubits.
Key responsibilities:
About You:
- Engineering diploma or Master’s degree in Electrical Engineering, Physics, Applied Physics, Materials Science or other related field; a PhD or one past work experience is also appreciated
- You love experimental lab work
- You have some experience in hardware and experimental setup design and fabrication
- You like collecting, organising and analysing your data. Programming skills are a plus
- You are detail-oriented and organized in your work and documentation style
- You are diligent, independent, result-oriented and have a problem-solving attitude
- Very good communication in English (verbal and written) is essential
- Experience in semiconductors
- Experience with high vacuum systems
- Experience in materials characterization techniques (SEM, TEM, AFM, probe station)
- Experience in carbon nanotubes
Preferred Traits:
What we offer:
- 55,000 - 70,000 euros yearly base salary
- Stock options for every employee (BSPCE/ESOP)
- Sponsored trip to conferences around the world
- A highly dynamic international team
- Swile meal vouchers
- Mental health support with moka.care
- Annual Learning & Development Allowance
- Sabbatical leave (after 2 years in the company)
- Vibrant office culture (two office spaces in the heart of Paris, team lunches, offsite events, Friday breakfasts..)
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!