Quantum Application Scientist
C12 Quantum Electronics
Data Science
Paris, France
Posted on Oct 9, 2025
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 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.
Your tasks will include:
- Develop impactful hybrid quantum algorithms and applications that promise commercial advantages in practice and scale
- Collaborate with the software team to implement and develop optimized hybrid workflow of quantum algorithms for our quantum architecture
- Collaborate closely with our business team and industrial partners to explore the potential of quantum computing for specific industries
- 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
- Participate in scientific collaborations with academic and industrial partners
- Present research findings in technical discussions and journal publications
About you:
- You have a PhD in computer science, quantum computing, mathematics, engineering physics or related fields
- 5 years of research and/or industry experience in developing hybrid end-to-end solutions for quantum computing applications would be appreciated
- Experience in applying quantum algorithms to practical problems in areas like optimization, simulation or machine learning
- Passion for tackling big challenges
- 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 a good command of English (oral and written)
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.