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 60, including 20 PhDs, has over 20 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.
Your role at C12 Quantum Electronics
As a Systems Engineer, MBSE at C12, reporting directly to the Head of Engineering, you will play a central role in bridging fundamental research and industrial-grade engineering. You will work in central Paris at the intersection of theoretical physics and large-scale hardware development, collaborating closely with physicists, engineers, software and product teams. Your mission is to shape, structure, and guide complex quantum hardware systems from early research concepts through to validated, scalable architectures, ensuring that cutting-edge science is translated into robust and manufacturable solutions. Your key responsibilities will include:Systems engineering leadership
Owning the MBSE system model as the source of truth, including governance for model quality, traceability, and change control.Defining and maintaining a system-level perspective, ensuring alignment with scientific, Defining modelling conventions, abstraction levels, and acceptance criteria for model contributions.Ensuring bidirectional traceability between requirements, architecture, analysis, and verification evidenceEmbracing a unique opportunity to pioneer systems engineering methods in quantum computing, developing practices in largely uncharted territoryCross-functional integration, documentation and decision support
Working closely with product, design, software, R&D, partnerships, and supply teams to define, refine, and document system and subsystem requirementsOwning the technical decision record at system level, ensuring decisions are consistent with models, experimental data, and approved assumptionsContributing to the definition of the hardware architecture roadmap across fabrication, testing, integration, validation and scalabilitySupporting informed make-or-buy decisions with partners and suppliersProviding impact analysis for proposed changes, and ensure changes follow agreed review and approval pathsResearch driven architecture and trade studies
Leading system-level trade studies with explicit criteria, quantified assumptions, and documented decisions, including rationale, risks and follow-up actions.Supporting the design and specification of quantum computer systems, identifying key system bottlenecks, technological barriers to industrialisation, and trade-offs.Collaborating with physicists to review technical papers and research results, translating scientific insights into system trade studies and initial performance requirements.Ensuring research concepts are evaluated against manufacturability and lifecycle constraints at an early stageStaying current with advances in quantum computing, quantum error correction, and quantum applications.
About you:
You have a master’s degree in Engineering, Physics, or a related fieldYou have 8+ years of experience in systems engineering within engineering-intensive industries such as aerospace, automotive, nuclear, or equivalentYou have strong rigor and discipline in system definition, analysis, validation and documentation.You have proven experience taking complex hardware systems from early concept through integration, validation, and iteration under technical uncertainty.You have proven experience with Model Based Systems Engineering, including hands-on experience with MBSE platforms, system modeling, simulation, and analysis tools.You have a solid background or understanding of physics, with the ability to engage deeply with scientific concepts and research.You are to operate in environments with incomplete data, evolving requirements, and high technical risk
What we offer:
Stock options for every employee (BSPCE/ESOP)Two incredible office spaces in the heart of Paris (both next to the famous Panthéon!)Sponsored trip to conferences around the worldA highly dynamic international teamSwile meal vouchersVibrant office culture (team lunches, offsite events, Friday breakfasts..)Mental health support with moka.careTraining budget/ Annual Learning & Development AllowanceSabbatical leave (after 2 years in the company)
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 60-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.
