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.
Role Overview
We are looking for a Chief of Staff to support the CEO and Head of Operations in driving day-to-day execution across C12.
This is a highly operational role focused on bringing structure, rigor, and velocity to the company, while scaling the organization and preserving our mindset.
You will act as a force multiplier for the CEO and Head of Ops, ensuring that priorities are clear, key initiatives are delivered on time, and communication flows effectively across the organization.
You will not be expected to define the strategy, but to make sure it is executed.
Execution tracking, Operational rigor, and OKRs follow-up
- Anticipate quarterly OKR cycles and maintain the framework in linear
- Track company priorities and key transversal projects end-to-end
- Maintain clear visibility on progress (Linear updates, critical initiatives)
- Ensure consistency and quality of reporting across teams
Right hand of the CEO and Head of Operations
- Support the CEO and Head of Ops on ad-hoc topics (incl. fundraising efforts)
- Drive cross-functional operational projects
- Organize and coordinate leadership sessions (preparation, notes, follow-ups)
- Act as a connective layer with teams to reduce friction and increase alignment
Content and Presentations
- Support preparation of weekly ExCom (agenda, metrics readiness, action tracking, company communication)
- Prepare internal presentations (Monday meetings, quarterly meetings)
- Support external materials (board decks, company presentations, talks) with the marketing team
- Contribute to thought leadership topics with Marketing
- Assist in preparing CEO interventions (calls, presentations, podcasts)
AI Operations Support
- Help deploy AI tools, prompts, and workflows across teams
- Support identification and rollout of practical AI use cases
- Coordinate AI training and change management initiatives
- Track ROI / impact of AI initiatives
- 2–4 years of experience in consulting, operations, or fast-paced startup environments
- Strong execution skills and a reputation for reliability
- Highly organized, structured, and detail-oriented
- Strong written and verbal communication skills in French and English
- Comfortable handling multiple topics in parallel
- High level of ownership and follow-through
- Interest in AI and operational efficiency tools
- Low ego, strong sense of responsibility, and team-oriented mindset
- A hands-on role at the core of company execution
- Direct exposure to how a deeptech company operates and scales
- Close collaboration with the CEO and Head of Operations
- A fast-paced environment with a steep learning curve
- €55,000 - €62,000 per year
- Stock options for every employee (BSPCE/ESOP)
- Two incredible office spaces in the heart of Paris
- 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 budget/ Annual Learning & Development Allowance
- Sabbatical leave (after 2 years in the company)
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.
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 80-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.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
