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C12qe

Research Engineer in Low Temperature Electronics

C12qe Paris Today
engineering
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 part of the CNT engineering team at C12, you will help develop and operate our cryogenic instruments in order to electrically characterize our ultra-pure carbon nanotube-based devices both via DC electrical transport and RF spectroscopy.

Your job will involve:

  • Operation and continuous improvement of the cryogenics setups
  • Install and set up new cryogenic instruments (cryostats, probe stations), from commissioning to wiring
  • Select the best electronic instruments to further increase our measurement bandwidth and enhance our device characterization feedback at low temperature
  • Write python scripts for automated high pace procedures
  • Write data analysis scripts to interpret our measurements and extract relevant metrics
  • Work with the software team to improve our proprietary measurement software and our internal database

    • About You:

  • Engineering diploma or Master’s degree in Optics, Physics, Applied Physics, Materials Science or other related field ; past work experience or a PhD is also appreciated
  • You love experimental lab work and you like writing python code
  • You have some experience in hardware and experimental setup design and fabrication
  • You like collecting, organising and analysing your data
  • You are detail-oriented and organized in your work and documentation style
  • You are diligent, autonomous, result-oriented and have a problem-solving attitude
  • Very good communication in English (verbal and written) is essential

    • Preferred traits :
  • Experience with low temperature electronics and transport measurements
  • Experience in carbon-based devices
  • Experience in materials characterization techniques (SEM, TEM, AFM)
  • Experience in RF measurements

    • What we offer:

  • 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
  • Vibrant office culture (team lunches, offsite events, Friday breakfasts..)
  • 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 like hands-on work and 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 encourages all who feel qualified to apply. Recruitment decisions are based solely on qualifications, skills, knowledge and experience. Applications from women are particularly welcomed.

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