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Quantum RF Engineer
Job Location:
Monthly Salary:
Posted:
9 June 2026 (30+ days ago)
Posted:
Application Deadline:
8 October 2026
Application Deadline:
Vacancies:
1 Vacancy
Vacancies:
Job Summary
Founded in 2020 and based in the heart of Paris C12s 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. Thats why our foundersdeeply rooted in academic and engineering excellencehave chosen carbon nanotubes as the building blocks of our quantum processors. This ultra-pure material dramatically reduces error rates boosts performance and minimizes hardware overheadkey 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 weve raised over 25 million in funding published 11 scientific papers and secured 8 patents. Today our fast-growing team of 90 people including over 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 youre 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 Quantum RF Engineer your main responsibility will be contributing to the design & optimization of passive and active on-chip microwave components for qubit control qubit-qubit interfacing and qubit readout.
You would be performing EM and circuit simulations for individual components and integrated systems along with contributions to cryogenic measurements for component and system performance verification.
Key responsibilities:
- You will design and conduct simulations of DC RF and microwave on-chip components
- You will contribute to the cryogenic measurement
- You will contribute to the continuous improvement of our python based design repository and integration with simulation workflow
- You will ne occasionally involved in design of mechanical parts (Fusion 360 SolidWorks) and PCBs.
About you:
- You have at least Masters degree in Quantum Physics (preferred) Applied Physics Electrical engineering Nanotechnology or Nanoscience or other related disciplines
- You have some previous experience designing and integrating RF & microwave components and subsystems:
- You have previous electromagnetic simulations experience using industry standard tools such as HFSS SONNET ADS Comsol
- You have experience with high-frequency (RF microwave or mm-wave) IC or PCB design
- You have experience with chip design layout tools like Klayout L-Edit
- You can design and development in Python
- You have great communication skills in English (oral and written)
Really nice to have:
- Experience with cryogenic RF and DC measurement
- Knowledge of semiconductor device physics and micro-fabrication processes
- Knowledge of fabrication principles and the constraints they impose on physical device parameters
What we offer:
What we offer:
- 55000 euros - 62000 euros yearly base salary
- 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 have a key role in a growing startup with challenges at the frontier of the 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 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.
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:
IC
About Company
Explore C12's innovative quantum technology solutions using carbon nanotubes. Discover how our advancements in quantum computing are shaping the future of technology.
