Quantum Measurement Expert

Sorry, this job was removed at 10:13 p.m. (CST) on Tuesday, Feb 24, 2026
Be an Early Applicant
Paris, Île-de-France, FRA
Hybrid
Quantum Computing
The Role
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 member of the quantum measurement team, your role will involve measuring and characterizing multi-spin qubit devices for the purpose of achieving quantum operations.

  • In collaboration with other scientists you will:
  • Develop and perform multi-qubits experiments with spin qubits coupled to microwave resonators in collaboration with our chip design team
  • Benchmark and improve fidelities of a single qubit gate, two-qubits gate to go beyond state-of-the-art results
  • Work closely with the theory team to improve the devices’ performance and implement simple algorithms and error correction protocols
  • Mentor and supervise the work of junior team members

About you:

  • You have a PhD in quantum physics
  • You have a post doc or first experience in industry
  • You have strong expertise in semiconductor spin qubits, or superconducting qubits.
  • Prior experience with hybrid CQED is highly valued. 
  • Previous experience with multi-qubit experiments is considered as an advantage.
  • You have a good command English (oral and written) 

You should join us if...
You want to have a key role in a growing startup with challenges at the frontier of the 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 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 Quantum Electronics’ unique technology
At C12, a qubit, the fundamental functional unit of a quantum computer, is built from an isotopically ultra-pure 12C nanotube suspended above a silicon chip containing control electrodes and a quantum communication bus. Our spin qubits hold great promise in terms of individual control and manipulation as well as for the circuit architecture. A suspended isotopically-pure 12C nanotube holds great promise in terms of stability, as it reduces all sources of decoherence (charge noise, nuclear spin noise and phonon relaxation).

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.

Similar Jobs

Datadog Logo Datadog

Corporate Development Lead - EMEA

Artificial Intelligence • Cloud • Security • Software • Cybersecurity
Easy Apply
Hybrid
Paris, Île-de-France, FRA
6500 Employees

ServiceNow Logo ServiceNow

Consultant

Artificial Intelligence • Cloud • HR Tech • Information Technology • Productivity • Software • Automation
Remote or Hybrid
Issy-les-Moulineaux, Hauts-de-Seine, Île-de-France, FRA
28000 Employees

ServiceNow Logo ServiceNow

Consultant

Artificial Intelligence • Cloud • HR Tech • Information Technology • Productivity • Software • Automation
Remote or Hybrid
Issy-les-Moulineaux, Hauts-de-Seine, Île-de-France, FRA
28000 Employees

ServiceNow Logo ServiceNow

Consultant

Artificial Intelligence • Cloud • HR Tech • Information Technology • Productivity • Software • Automation
Remote or Hybrid
Issy-les-Moulineaux, Hauts-de-Seine, Île-de-France, FRA
28000 Employees
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.

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 !

Similar Companies Hiring

Mastercard Thumbnail
Quantum Computing • Payments • Fintech • Cybersecurity • Cryptocurrency • Consulting • Blockchain
Purchase, NY
38800 Employees
HRL Laboratories Thumbnail
Software • Semiconductor • Quantum Computing • Machine Learning • Hardware • Defense • Computer Vision
Malibu, CA
1115 Employees

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account