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 75, including 20 PhDs, has over 25 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.
C12 is building breakthrough quantum technologies through a unique combination of scientific excellence, engineering innovation and ambitious execution. As we grow, we are creating a new generation of managers across the company. Helping these managers succeed is critical to our ability to scale our teams, develop our talent and preserve the culture that makes C12 unique. We are looking for a Senior People Partner to work closely with managers across the organisation. You will help them navigate people challenges, develop their leadership capabilities, build high-performing teams and make thoughtful talent decisions. Additionally, you will collaborate closely with the People Operations team on essential HR processes and enhance management and leadership skills throughout C12. You will be a trusted advisor to managers, a close partner to our Head of Operations (in charge of People), and a key contributor to the evolution of our organisation as we grow.
Your key responsibilities will include:
- Building trusted relationships and collaborate: establishing strong, trusted relationships with managers throughout the organisation and work alongside the People Operations team to support them across the entire People cycle, including recruitment, onboarding, performance management, development, internal mobility, and offboarding.
- Coaching and guidance: providing coaching for managers in navigating day-to-day leadership challenges and complex people issues, while also supporting them in difficult conversations, performance management, and enhancing team dynamics.
- Employee engagement and talent management: advising managers on strategies for employee engagement, motivation, and retention; while helping to identify capability gaps and future talent needs within their teams.
- Supporting organisational change and communication: assisting in team evolution and organisational changes as needed, ensuring effective communication flows between managers, the People team, and company leadership.
- Cultivating management excellence at C12: contributing to defining and scaling great management practices at C12 by helping to establish management principles and expectations, designing and continuously improving manager onboarding experiences, and developing practical tools, frameworks, and resources for managers.
- Enhancing training and development: organising and coordinating management training, coaching, and development initiatives to foster consistency and fairness in management practices across teams, while building communities of practice among managers to share insights and best practices.
- Committing to continuous improvement: gathering feedback from managers and teams to refine our People practices, creating systems, habits, and capabilities that enable effective management at scale.
- Collaborating with the Head of Operations on people matters: acting as a liaison between managers, employees, the People team, and the Head of Operations by assisting in the preparation for the performance review calibration and promotion committee, surfacing emerging people challenges and organisational risks, and providing insights on engagement, team dynamics, and retention concerns. Additionally, you will support the deployment and adoption of people initiatives while acting as a steward of C12’s culture and values across the organisation.
- You have significant experience (6+ years) as an HR Business Partner, People Partner or equivalent role in a scale-up environment. Experience supporting engineering, scientific or deep-tech organisations is a plus.
- You have excellent listening skills and the ability to build trust with a wide range of stakeholders
- You have a demonstrated ability to influence and challenge constructively without relying on authority
- You have strong facilitation, communication and coaching skills
- You are able to drive difficult conversations when needed
- You are empathetic, pragmatic and you adapt your approach to the different people challenges you face
- You are able to navigate ambiguity and balance multiple perspectives
- You are passionate about leadership development and organisational effectiveness
- You are able to balance strategic thinking with hands-on execution
- €75,000 - €85,000 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.
