Emplacement

Paris
France
France

Contrat

À plein temps, Durée indéterminée

Date de publication:

2026-11-10

Online to:

2027-01-09
EUR 15.00 HOUR

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Thermal Systems Engineer

p Paris /pp Business Operations – Engineering / /pp Full - time / /pp On-site /pp ppFounded 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. /ppAt 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. /ppSince 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#39; historic Panthéon district, where scientists, engineers, and innovators work side-by-side to tackle some of the most exciting technical challenges of our time. /ppIf you#39;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. /p /p /pp ph3Your role at C12 Quantum Electronics: /h3p ppp pAs strongThermal Modeling Cryogenic Systems Engineer (Quantum Hardware) /strong, you will play a central role in enabling the next generation of our quantum computers. You will own the thermal architecture and thermal models of complex cryogenic quantum systems that combine a growing number of qubits with increasingly sophisticated cryo-electronics. /ppYour work will be critical to ensuring system scalability, thermal stability and quantum performance. /ppYou will operate at the intersection of cryogenics, thermal physics, electronics and quantum hardware whilst working closely with quantum physicists and engineers. /ppKey responsibilities: /pp ullipDevelop and maintain system-level thermal models of quantum hardware systems, including qubits, wiring, passive components, and cryo-electronics across all cryogenic stages /p /lilipWork closely with system engineers and physicists to identify thermal constraints and scaling bottlenecks, evaluate architecture options and guide system design decisions. /p /lilipOwn the thermal budget, including trade-off analysis of different technological options (qubit architectures, wiring schemes, cryo-electronics integration levels, materials) /p /lilipOwn the thermal performance of cryogenic quantum hardware platforms by defining and executing validation experiments, correlating predictions with measurements, investigating discrepancies and implementing solutions to inform thermal and system architecture decisions /p /lilipDesign and evaluate thermalization strategies for signals, wiring, and cryo-electronics, including materials and interfaces, to minimize heat loads while preserving signal integrity. /p /lilipParticipate in the integration and operation of cryogenic test platforms, including instrumentation, thermal characterization and investigation of unexpected system behavior /p /lilipDocument thermal assumptions models, and design rules to support product development /p /li /ul /p /p /p /p /p /p /pp ph3About you: /h3p pp ullipYou have a PhD in Mechanical Engineering, Physics, Cryogenics or a closely related field with industry experience or a Masters with at least 5 years of experience in industry /p /lilipYou have a strong background in thermal engineering and cryogenics /p /lilipYou have proven experience building and maintaining thermal models to guide design decisions /p /lilipYou are comfortable working across disciplines with quantum hardware, electronics, and systems teams /p /lilipYou are hands-on with dilution refrigerators and multi-stage cryogenic platforms /p /lilipYou have demonstrated expertise in thermal modeling and simulation using analytical and numerical methods. /p /lilipYou have experience defining and managing thermal budgets in systems with dense wiring and/or cryo-electronics /p /lilipYou are familiar with RF and DC wiring, signal thermalization and heat sinking at cryogenic temperatures /p /lilipYou have experience validating thermal models through experimental measurements and data analysis /p /lilipYou have programming or scripting experience for data analysis and model automation (e.g. Python, Matlab) /p /lilipPrior experience in quantum hardware, superconducting systems, or other ultra-low-temperature technologies is a strong plus /p /li /ul /p /p /p /p /pp ph4What we offer: /h4ulli65,000 euros - 78,000 euros yearly base salary /liliStock options for every employee (BSPCE/ESOP) /liliSponsored trip to conferences around the world /liliA highly dynamic international team /liliSwile meal vouchers /liliMental health support with a moka.care /a /liliTraining budget/ Annual Learning Development Allowance /liliSabbatical leave (after 2 years in the company) /liliVibrant office culture (two office spaces in the heart of Paris, team lunches, offsite events, Friday breakfasts..) /li /ul /ph4You should join us if... /h4ulliYou like hands-on work and technology /liliYou want to contribute to achieving landmark results in quantum computing, making a difference in the emerging quantum technologies /liliYou 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 /liliYou want to thrive in an exceptional scientific environment with several industrial and academic partners /liliYou share our values (excellence, scientific integrity, diversity, curiosity, and care) and want to help us define our product-focused culture and ambition to accelerate /li /ulpemWe 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. /em /ppemApplications from women are especially welcomed! /em /p /pp p 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. /p /p

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Thermal Systems Engineer

Emplacement

Contrat

Date de publication:

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Thermal Systems Engineer

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