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.
As a quantum application scientist, you will be responsible for research and development towards practical applications of quantum computing using C12’s hardware in both near-term and fault-tolerant era. You will have the responsibility of assisting the making of industrial collaborations from the technical perspective, giving technical support to the business team to ensure the feasibility and relevance of projects, identify relevant quantum algorithms partners if required and to identify use cases for clients for which C12 holds a competitive advantage.
Key responsibilities:
- You will develop impactful hybrid quantum algorithms and applications that promise commercial advantages in practice and scale
- You will collaborate with the software team to implement and develop optimized hybrid workflow of quantum algorithms for our quantum architecture
- You will collaborate closely with our business team and industrial partners to explore the potential of quantum computing for specific industries
- You will partner with our clients and strategic partners to define and solve problems of real-world interest, and to develop quantum algorithms tailored to their specific needs
- You will participate in scientific collaborations with academic and industrial partners
- You will present research findings in technical discussions and journal publications
- You have a PhD in computer science, quantum computing, mathematics, engineering physics or related fields
- You have 5 years of research and/or industry experience in developing hybrid end-to-end solutions for quantum computing applications would be appreciated
- You have experience in applying quantum algorithms to practical problems in areas like optimization, simulation or machine learning
- You have a passion for tackling big challenges
- You are self-motivated and able to work independently
- You are able to collaborate across diverse teams of expert engineers from various backgrounds (chemistry, experimental physics, mathematics, engineering … )
- You have good communication skills in English (oral and written)
- 62,000 euros to 78,000 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
- Training budget/ 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 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.
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!
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
