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RF Engineer for Quantum Hardware

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C12 Quantum Electronics

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Location:
France , Paris

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Contract Type:
Not provided

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Salary:

Not provided

Job Description:

C12 develops reliable & application-specific quantum computers, to solve highly complex computing tasks, currently out of reach of even most powerful supercomputers. C12 uniquely uses carbon nanotubes as the fundamental building blocks of its quantum processor. This high-purity material minimizes errors, radically improves performance and reduces hardware overhead for fault-tolerant computing.

Job Responsibility:

  • Contributing to the design & optimization of passive on-chip distributed RF circuits for qubit control and performing & analyzing microwave simulations
  • Developing, with research scientists and other hardware engineers, microwave simulations for the on-chip RF circuits and its 3D packaging
  • Identifying cross-talks and loss mechanisms in RF circuits
  • Investigating discrepancies between simulated and achieved performance of fabricated devices
  • Develop a scalable architecture for routing the microwave signal (very low power) towards and between >100 qubits
  • Contributing to the continuous improvement of our simulation tools and their integration with Python-based custom layout/design tools

Requirements:

  • Minimum 5+ years experience as an RF engineer
  • Experience developing electromagnetic simulations using industry standard tools such as HFSS, Maxwell, Comsol, or Cadence
  • Experience with designing and integrating microwave components and subsystems
  • Experience with high-frequency (RF, microwave or mm-wave), IC or PCB design
  • Experience with design/development in Python
  • Good communication in English (verbal and written)

Nice to have:

  • Experience in designing superconducting resonator is seen as an advantage
  • Knowledge of semiconductor device physics and microfabrication processes is seen as an advantage
  • Knowledge of fabrication principles and the constraints they impose on physical device parameters is seen as an advantage

Additional Information:

Job Posted:
January 03, 2026

Employment Type:
Fulltime
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