Quantum Hardware Researcher

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 60, including 20 PhDs, has 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 a Quantum Hardware Researcher, you will join the theory team under the supervision of an experienced physicist on our technology. Your goal is to participate in the development of theoretical models to better understand the physics of our hardware and support our experimentalists for the interpretation of their data. This covers the understanding of the physics of our materials and design as well as the optimisation and design of logical operations and measurement protocols.

**Your tasks will include**:

- Develop deeper understanding of the physics of the hardware
- Support the experimental teams in interpreting their data by developing useful models or tools for them to fit their data
- Support the engineering and product team in building our roadmaps
- Collaborating with domain experts to translate business problems into challenges tractable by quantum algorithms
- Presenting research findings in technical discussions and journal publications

**About you**:

- You have significant experience, preferably a PhD, in quantum physics or related topics
- You are familiar with the theory of decoherence in quantum physics
- You are familiar with light matter interaction in physics
- You have past experience in some programming languages such as python or C/C++
- You are able to collaborate across diverse teams of expert engineers from various backgrounds (chemistry, experimental physics, mathematics, engineering)
- Great verbal and written communication in English

**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 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.