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.
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Your role at C12:
You will lead the nano-assembly team, composed of 3 research engineers. You will help them develop and operate efficiently our nano-assembly setups for the transfer of ultra-pure carbon nanotubes onto our quantum processor microchips.
Responsibilities:
- Continuous improvement of our custom nano-assembly vacuum setups for increased throughput and yield
- Design and validation of mechanical, electrical and chemical processes to optimize the quality of the assembled qubits
- Working with the software team to improve our stack for control software, data storage and data analysis
- Analyze, summarize and present data
About You:
- You have at least 3 years of experience in R&D or a PhD in Electrical Engineering, Physics, Applied Physics, Materials Science or other related field
- You have some experience in managing R&D engineers and organizing their work
- You have some project management experience
- You have some experience in hardware and experimental setup design and fabrication
- You like collecting, organizing and analyzing your data
- You have experience in python for hardware control and data analysis
- You are detail-oriented and organized in your work and documentation style
- Good communication in English (oral and written)
Preferred Traits:
- Experience in semiconductors
- Experience with high vacuum systems
- Experience in materials characterization techniques (SEM, TEM, AFM, probe station)
- Experience in carbon nanotubes
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What we offer:
- 72,000 - 81,000 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 Nano-assembly Lead role type exists at the critical operational nexus of advanced material manipulation and quantum processor fabrication. As the quantum hardware sector transitions from fundamental laboratory physics to repeatable microchip manufacturing, assembly precision at the nanometer scale directly dictates yield, qubit fidelity, and physical scalability. By bridging solid-state material synthesis with chip-level integration, this function resolves structural bottlenecks in physical QPU assembly. Market signals from international quantum technology roadmaps highlight that precise nano-manipulation is essential for enabling novel qubit architectures that minimize environmental decoherence. Consequently, leading this specialized manufacturing domain directly stabilizes the hardware supply chain and drives the transition toward commercial-scale, fault-tolerant processing platforms.
Within the broader quantum technology value chain, physical hardware fabrication represents both the highest barrier to entry and the primary determinant of long-term scalability. Novel QPU architectures, particularly those leveraging low-dimensional materials or carbon nanostructures, require assembly protocols that far exceed standard semiconductor cleanroom capabilities. The industry faces significant challenges in transitioning these bespoke, manual nanomanipulation techniques into high-throughput, automated manufacturing workflows. This transition is essential for overcoming the Technology Readiness Level (TRL) gap between experimental single-qubit demonstrations and multi-qubit fault-tolerant systems.
At the ecosystem level, hardware developers encounter severe constraints related to yield predictability, material purity, and structural reproducibility. The integration of high-vacuum systems, precision motion control, and multi-modal material characterization must be synchronized across cross-functional engineering units. As public funding initiatives and private capital demand clearer pathways to commercial quantum advantage, scaling physical assembly throughput becomes a strategic priority across the sector.
Furthermore, vendor fragmentation in custom instrumentation forces leading quantum hardware enterprises, including C12 Quantum Electronics, to design specialized internal tooling infrastructure. Establishing robust nano-assembly capabilities mitigates global supply chain dependencies and accelerates internal hardware iteration cycles. Sector-wide efforts continue to address talent and integration challenges in quantum systems, placing a premium on multidisciplinary technical leadership capable of managing these complex physical interfaces.
The technical skill architecture for this role type spans advanced nanomanipulation, vacuum setup engineering, and multi-modal material characterization protocols. Mastering precise spatial transfer mechanisms under ultra-high vacuum conditions is critical for maintaining material purity and preserving quantum state coherence. Proficiency in automated hardware control, data collection pipelines, and statistical analysis frameworks ensures that physical assembly parameters are systematically correlated with final qubit performance metrics. Additionally, expertise in characterization techniques such as scanning electron microscopy, atomic force microscopy, and electrical probing enables real-time verification of structural integrity before microchip integration. These integrated capabilities optimize assembly throughput, reduce device-level defect rates, and accelerate cross-functional feedback loops between hardware design, software control, and physical fabrication teams. - Accelerates the transition from manual laboratory nanomanipulation to automated, scalable processor fabrication workflows
- Enhances QPU manufacturing yield by optimizing physical material transfer precision and structural reliability
- Reduces iteration cycle duration between fundamental material characterization and integrated microchip assembly
- Mitigates physical decoherence vectors through precise alignment and integration of low-noise quantum materials
- Standardizes data collection and automated control architectures for high-throughput assembly setups
- Facilitates cross-functional alignment between physical fabrication, hardware engineering, and software stack teams
- Strengthens organizational intellectual property portfolios around specialized nanomanipulation and packaging protocols
- Minimizes capital expenditure loss by maximizing functional qubit counts per fabrication run
- Improves structural reproducibility across multi-qubit processor architectures to support fault-tolerant scaling
- Secures the hardware supply chain through internal optimization of custom vacuum and assembly infrastructure
- Elevates technology readiness levels for novel quantum computing hardware modalities
- Drives the commercialization roadmap for enterprise-grade quantum hardware through scalable physical manufacturingIndustry Tags: Quantum Hardware, Nano-assembly, Carbon Nanotubes, Nanofabrication, QPU Packaging, Microchip Manufacturing, High Vacuum Systems, Material Characterization, Deep Tech Manufacturing, Qubit Scalability
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