C12

Quantum Application Scientist

Posted 14 Days Ago

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Paris, Île-de-France

In-Office

Expert/Leader

Quantum Computing

The Role

The Quantum Application Scientist will develop hybrid quantum algorithms, collaborate with various teams, and engage in industry partnerships to apply quantum computing solutions.

Summary Generated by Built In

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.

Top Skills

Hybrid Quantum Algorithms

Machine Learning

Optimization

Quantum Computing

Simulation

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The Company

HQ: Paris

54 Employees

Year Founded: 2020

What We Do

C12 is building reliable quantum computers.

The company is a spin-off from ENS launched in January 2020 by twin brothers Matthieu and Pierre Desjardins to supercharge the development of the lab’s promising new quantum technology.

Quantum computing has the potential to change our lives. But frequent errors limit the technology’s viability. We are tackling the fundamental issue: the nature of the hardware itself. We are tapping into the simplest material–carbon–to drive a technological breakthrough in the field. Unlike other quantum computers, we use carbon nanotubes as the fundamental building block of our processor. By combining the power of an ultra-pure material with an easy-to-manufacture semiconductor device, we are building a scalable platform for quantum computing.

Our executive co-founders bring a unique combination of scientific excellence and business skills to the company. Our team is made up of the world’s most accomplished experts in quantum electronics and carbon nanotube science. Our scientific advisors are renowned scientists and pioneers in spin qubits: Dr. Takis Kontos, Dr. Matthieu Delbecq and Dr. Jérémie Viennot.

In June 2021, C12 secured a $10 million seed round with funding from 360 Capital, Bpifrance (Digital Venture Fund), Airbus Ventures, BNP Paribas Développement, and Octave Klaba (OVHcloud), and additional grants from Bpifrance and the Ile-de-France Region.

We are leading quantum’s next material breakthrough, and we are just getting started. Silicon enabled the emergence of classical computing – it’s time for carbon to do the same for quantum !