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Marketing & Communications Assistant

C12 Quantum Electronics

Job Location:

Paris - France

Yearly Salary: € 45000 - 50000

Posted: 3 July 2026 (30+ days ago)

Application Deadline: 15 October 2026

Vacancies: 1 Vacancy

Job Summary

C12 develops reliable & application-specific quantum computers to solve complex computing tasks currently out of reach of even the most powerful supercomputers. Building a quantum computer still needs innovators who are ready to tackle exciting challenges. At C12 we are convinced that a new material for the qubit will bring a technological breakthrough.

At C12 the fundamental building block of the quantum processora qubitis constructed usingultra-pure carbon nanotubes suspended above a silicon chip with control electrodes and superconducting resonators. This high-purity material minimises errors enhances performance and reduces hardware overhead for fault-tolerant computing. Spin qubits coupled to a microwave resonator offer exciting possibilities for control manipulation and circuit architecture.The suspended isotopically pure 12C nanotube significantly improves stability by reducing sources of decoherence such as charge noise nuclear spin noise and phonon relaxation. Leveraging well-established semiconductor techniques carbon nanotubes hold great promise for scaling quantum computing much like silicon in classical computing.

Founded in 2020 C12 is a fast-growing start-up who recently raised EUR 18 million in 2024 to further its research in its own lab in the heart of Paris (Panthéon).

Your role at C12 Quantum Electronics:

At C12 Marketing & Communications spans science business and storytelling. We manage everything from press and social media to events partnerships and institutional visits working closely with our co-founders scientific team and external partners to build C12s visibility in the quantum ecosystem and beyond.

We are looking for a Marketing & Communications Assistant to join as the second person on the team. You will work directly with our Marketing & Communications Manager and be the driving force behind C12s day-to-day communications.

Key responsibilities:

Owning LinkedIn & X end -to end:content calendar drafting scheduling and performance tracking
Creating on-brand content autonomously across text visuals and other formats writing and publishing blog articles for SEO and repurposing across channel
Owning event logistics including: tracking materials suppliers booth merch and follow-ups
Attending and representing C12 at events as well as organising and supporting lab visits for press journalists and PR partners
Creating branded decks flyers social posts infographics and website visuals
Supporting announcements around product milestones new hires lab updates and key company moments
Tracking and analysing marketing performance metrics and provide insights for improvement

About you:

You hold a bachelors or masters degree in Marketing Communications or a related field. A scientific background or genuine curiosity for tech is a bonus.
You are fluent in French and English written and spoken
You have a first experience in marketing and communications. Experience in a start-up or fast-moving environment is a bonus
You have a track record of creating and managing social content particularly on LinkedIn and with design tools like Canva Figma or Adobe
You have strong organizational skills and attention to detail
You are proactive creative curious and enjoy introducing fresh ideas.

What we offer:

45000 - 50000 per year
Stock options for every employee (BSPCE/ESOP)
Sponsored tripto conferences around the world
A highly dynamicinternational team
Swile meal vouchers
Mental health support with
Training budget/ Annual Learning & Development Allowance
Sabbatical leave (after 2 years in the company)
Vibrant office culture (two office spaces in the heart of Paris team lunches offsite events Friday breakfasts..)

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.

We still encourage even if you dont meet all the requirements. Rest assured we are committed to finding the right fit for our team and are open to adjusting compensations based on skills and experiences. Applications from women are especially welcomed!

We may use artificial intelligence (AI) tools to support parts of the hiring process such as reviewing applications analyzing resumes or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. 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.

Required Experience:

Junior IC

Apply Now

About Company

C12 Quantum Electronics

Explore C12's innovative quantum technology solutions using carbon nanotubes. Discover how our advancements in quantum computing are shaping the future of technology.

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