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Salary
≈ $51k – $87k per year (Estimated)
Location
Hybrid (Paris, France)
Seniority
Senior · 5+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 16, 2026. First seen by Alion on Sep 16, 2026. C12 scores A on the Alion truth index.

Overview
Company
Impact
Profile match

C12

C12 is a quantum computing hardware company headquartered in Paris, France, and founded in 2020 by twin brothers Matthieu and Pierre Desjardins. The company builds spin qubits from ultra pure carbon nanotubes suspended over silicon chips, an approach intended to reduce the noise that limits conventional solid state qubits. It works with research institutions and industrial partners in Europe and manufactures its devices using semiconductor compatible processes.

Your role at C12 Quantum Electronics:

    The Software team is here to assist and facilitate the work of the research teams towards building a quantum computer.

    As a Senior Software Engineer, you will be at the forefront of shaping the future of quantum measurement and help build the framework that runs experiments on quantum computers. Your expertise will drive the development and innovative solution that bridges the gaps between our R&D and engineering, enabling breakthrough in quantum technology.

    Key responsibilities:

  • Lead the design and development of our core quantum measurement software framework, ensuring high performance and long-term maintainability
  • Partner with our R&D and other engineering teams at C12 to translate complex experimental requirements into robust, scalable software solutions
  • Define and document the unified architecture for instrument control, high-throughput data storage, and measurement orchestration to support framework growth
  • Champion rigorous software practices, including comprehensive code reviews, proactive design discussions, and robust CI/CD and automated testing pipelines
  • Take ownership of the full software lifecycle, delivering robust, secure, and scalable solutions that meet the rigorous demands of quantum R&D
  • Cultivate a culture of continuous learning by mentoring junior engineers and leading by example in code quality and system design

About you:

  • You have 5+ years of experience building robust backend systems or data-intensive applications
  • You are comfortable working with Python as a primary language; if coming from another background, you are eager to master the ecosystem
  • You’re familiar or comfortable working with message brokers (e.g., RabbitMQ, ZeroMQ, Kafka) and relational databases (PostgreSQL), SQLAlchemy, etc
  • Prior experience with orchestration tools like Prefect or Airflow is a strong plus
  • A background in physics, engineering, or another quantitative field is a strong plus
  • You are curious, adaptable, ready to discover new languages/frameworks/apis
  • A problem solver that tries to use the best tool for the job
  • You communicate clearly in English and work well in collaborative development environments
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