C12 Jobs

Cleanroom Engineer

C12

Cleanroom Engineer

Posted 2 Days Ago

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Paris, Île-de-France, FRA

In-Office

53K-70K Annually

Mid level

Quantum Computing

The Role

Operate, maintain, and improve cleanroom equipment to support wafer fabrication for R&D and early production. Perform preventive maintenance, troubleshooting, vendor coordination, safety/SOP development, spare parts management, and continuous improvement to ensure uptime and quality in a startup quantum computing lab.

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 80+, including 20 PhDs, has over 26 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 Cleanroom Engineer at C12, you will be responsible for the operation, maintenance, and continuous improvement of cleanroom equipment. You will work hands-on with several process systems, ensuring reliable wafer production while maintaining the highest standards of safety, quality, and uptime in a startup environment.

This role is ideal for someone who enjoys technical ownership, problem-solving, and close collaboration with researchers, facilities, and external vendors.

Key Responsibilities:

Take technical ownership of several cleanroom tools, including:

Regular performance checks, calibration, and preventive maintenance

Troubleshooting and first-line repairs

Operate process tools to support wafer fabrication for R&D and early production
Anticipate technical and operational risks; propose and implement mitigation actions
Coordinate with equipment manufacturers, service engineers, and vendors for installations, upgrades, and major repairs
Anticipate facility-related bottlenecks (utilities, gases, vacuum, HVAC, etc.) and support continuous improvement initiatives
Develop, implement, and maintain safety standards, SOPs, and best operational practices
Interface efficiently with subcontractors and suppliers to sustain an uninterrupted fabrication process
Contribute to cleanroom documentation, tool logs, spare parts management, and maintenance planning

Required Qualifications:

Bachelor’s or Master’s degree in Engineering, Physics, Materials Science, Micro/Nano-fabrication, or a related field
Hands-on experience in a cleanroom environment (academic or industrial)
Practical knowledge of some of the following processes or tools:

Lithography

Thin-film deposition (PVD, CVD, ALD)

Dry etching (RIE, ICP) and/or wet processing

Experience with tool maintenance, troubleshooting, and vendor coordination
Strong awareness of cleanroom safety and chemical handling
Ability to work autonomously, prioritize tasks, and thrive in a startup environment
Fluency in English (working proficiency required)

What We Offer:

€53,000 - €70,000 per year
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
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.

We still encourage you to apply, 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 compensation based on skills and experience. Applications from women are especially welcome.

Skills Required

Bachelor's or Master's degree in Engineering, Physics, Materials Science, Micro/Nano-fabrication, or related field
Hands-on experience in a cleanroom environment (academic or industrial)
Practical knowledge of lithography processes
Practical knowledge of thin-film deposition (PVD, CVD, ALD)
Practical knowledge of dry etching (RIE, ICP) and/or wet processing
Experience operating and supporting wafer fabrication for R&D and early production
Experience with tool maintenance, troubleshooting, and vendor coordination
Strong awareness of cleanroom safety and chemical handling and ability to develop SOPs
Ability to work autonomously, prioritize tasks, and thrive in a startup environment
Fluency in English (working proficiency required)

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The Company

HQ: San Antonio, TX

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 !