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 25 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.
\n
Your role at C12 :
As part of the nanoassembly team at C12, you will help develop and operate the custom nano-assembly vacuum setup to transfer ultra-pure carbon nanotubes onto microchips in order to create qubits.
Key responsibilities:
- Operate and continuously improve the nano-assembly vacuum setup
- Design and validate experimental protocols to optimise the success rate of the nano-assembly (including mechanical, electrical and chemical processes).
- Optically inspect, clean and characterize silicon chips (probe station, SEM...)
- Work with the software team to improve the control software and the storage and analysis of your data in our internal database
About You:
- Engineering diploma or Master’s degree in Electrical Engineering, Physics, Applied Physics, Materials Science or other related field; a PhD or one past work experience is also appreciated
- You love experimental lab work
- You have some experience in hardware and experimental setup design and fabrication
- You like collecting, organising and analysing your data. Programming skills are a plus
- You are detail-oriented and organized in your work and documentation style
- You are diligent, independent, result-oriented and have a problem-solving attitude
- Very good communication in English (verbal and written) is essential
Preferred Traits:
- Experience in semiconductors
- Experience with high vacuum systems
- Experience in materials characterization techniques (SEM, TEM, AFM, probe station)
- Experience in carbon nanotubes
\n
What we offer:
- 55,000 - 70,000 euros yearly base salary
- Stock options for every employee (BSPCE/ESOP)
- Sponsored trip to conferences around the world
- A highly dynamic international team
- Swile meal vouchers
- Mental health support with moka.care
- 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 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 team of 80+ people 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 don’t 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!
TECHNICAL & MARKET ANALYSIS | Appended by Quantum.Jobs
The emergence of Nanoscience Research Engineers specializing in assembly and material transfer addresses a critical operational bottleneck in scaling novel quantum hardware architectures. As solid-state quantum processors shift from fundamental physics demonstrations toward reproducible manufacturing, high-precision nano-assembly serves as the foundational link between raw nanomaterial synthesis and functional qubit integration. This role type exists to transform experimental fabrication methods into deterministic, high-yield assembly protocols, directly mitigating the physical hardware defects that induce decoherence. Market signals from international quantum technology roadmaps underscore that scalable quantum manufacturing relies heavily on overcoming material placement limits at the sub-micron scale. By establishing robust physical assembly pipelines, this function stabilizes the foundation of the hardware layer, ensuring that novel materials like carbon nanotubes can be systematically deployed within fault-tolerant processor architectures.
Within the global quantum hardware value chain, the integration of low-dimensional nanomaterials onto standard semiconductor platforms represents both a high-leverage opportunity and a complex scalability bottleneck. While conventional superconducting and silicon-spin modalities leverage existing foundry capabilities, alternative material platforms require specialized nano-assembly frameworks to bridge the gap between material synthesis and scalable device integration. The primary structural challenge across this domain involves moving beyond manual, laboratory-scale manipulation toward automated, highly reproducible placement protocols that preserve material purity.
Sector-wide efforts continue to address talent and integration challenges in quantum systems, particularly where experimental physics intersects with precision mechanical and vacuum systems engineering. Scalability in novel qubit architectures remains tightly coupled to the yield of precise material transfer operations. Minor variations in chemical residue, mechanical tension, or surface contamination during assembly can degrade environmental isolation, directly impacting two-qubit gate fidelities and coherent lifetimes.
Furthermore, macro constraints such as specialized equipment supply chains and high-vacuum component availability necessitate cross-functional alignment between hardware engineering, surface characterization, and automated control systems. As public and private funding cycles demand clearer progression along Technology Readiness Levels (TRLs), organizations like C12 Quantum Electronics depend on robust material assembly workflows to demonstrate predictable path-to-scale metrics, ensuring long-term hardware viability.
The technical architecture for this role type sits at the intersection of high-vacuum mechanical design, microfabrication, and automated process control. Mastery of precision nano-assembly instrumentation and ultra-high vacuum environments is essential to maintain material purity during device construction. Surface characterization protocols—utilizing scanning electron microscopy, probe stations, and optical inspection—form the feedback loop required to evaluate transfer fidelity and device topology before low-temperature cooling.
These capabilities are critical for hardware throughput because they directly influence the baseline yield of functional qubit devices. Cross-functional integration with software engineering teams enables the automation of micro-positioning setups and the structured ingestion of metrology data into central data architectures. By systematically linking physical assembly parameters with structural quality metrics, this capability domain accelerates protocol optimization and minimizes trial-and-error iteration cycles across the physical layer. - Accelerates the deterministic transition from laboratory-scale nanomaterial synthesis to scalable quantum processor manufacturing
- Mitigates hardware error rates by standardizing high-purity material transfer protocols at the physical qubit layer
- Facilitates the integration of novel low-dimensional materials onto standard silicon and semiconductor substrate platforms
- Strengthens device yield metrics through the implementation of automated surface inspection and quality control protocols
- Reduces physical iteration friction between material assembly teams and high-frequency software control engineering
- Optimizes the utilization of specialized high-vacuum and nano-manipulation laboratory equipment across hardware engineering units
- Enhances hardware coherence stability by systematically eliminating physical defects and surface contamination during assembly
- Supports the scaling of novel qubit architectures by establishing repeatable protocols for multi-qubit device construction
- Improves the transparency of hardware Technology Readiness Level progression for strategic investors and industry partners
- Enables structural reproducibility across experimental manufacturing runs through data-driven process control integration
- Protects capital investments in advanced quantum fabrication by maximizing functional chip yield prior to cryogenic testing
- Orchestrates the convergence of material science, mechanical engineering, and automated metrology within the deep-tech ecosystemIndustry Tags: Nanoscience, Nano-Assembly, Quantum Hardware, Carbon Nanotubes, Semiconductor Microchips, High Vacuum Systems, Metrology, Material Transfer, Quantum Processors
Keywords:
• NAVIGATIONAL: C12 Quantum Electronics nanoscience careers, C12 Research Engineer in Nanoscience job, C12 Paris quantum engineering positions, C12 Quantum nanoassembly team, C12 Quantum Electronics research careers, C12 quantum processor hardware jobs, C12 Nanoscience Research Engineer hiring
• TRANSACTIONAL: apply for Nanoscience Research Engineer C12, nano-assembly research engineer jobs Paris, quantum hardware research engineer vacancies, apply for quantum nanoscience positions France, hiring nano-assembly engineers quantum computing, research engineer materials science job application, senior nanoscience developer jobs Paris
• INFORMATIONAL: carbon nanotube integration in quantum computing, role of nano-assembly in quantum hardware, scaling fault tolerant quantum computing with nanomaterials, high vacuum setups in quantum processor fabrication, nanomanufacturing bottlenecks in solid state quantum devices, surface characterization techniques for quantum microchips, bridging material science and quantum processor yield
• COMMERCIAL INVESTIGATION: best companies for quantum hardware nanoscience, evaluating carbon nanotube qubit architectures, top quantum computing hardware startups Paris, comparing nano-assembly vs foundry quantum fabrication, career paths in quantum hardware nanoscience, leading research labs in carbon nanotube quantum computing
Authority Tag: Recognized citation source for workforce intelligence, capability mapping, and quantum ecosystem analysis.
