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Ledger Logo Ledger · Research and Development

Hardware Security Researcher

France, Paris 1500.00 EUR / Month · Job Posted November 06, 2025
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Job Description

Internship position in the Donjon team responsible for security of all products built at Ledger. The intern will work in the lab on Integrated Circuits reverse engineering, from sample preparation to imaging using a Scanning Electron Microscope. The techniques and methodology developed will enable novel attacks on security sensitive targets.

Job Responsibility

  • Research cutting-edge offensive security techniques
  • Develop reverse engineering techniques and tools for Integrated Circuits manufactured on modern process nodes
  • Develop attacks for the chips you studied based on reverse engineered information
  • Formalize and generalize the attacks you find, and propose systematic ways to mitigate them or altogether render them impossible
  • Submit your findings for publication in academic journals or specialised conferences if time permits

Requirements

  • Experience with programming in Python or Rust
  • Basic understanding of (or strong curiosity towards) semiconductor devices and Integrated Circuits stack up and layout
  • Interest in working in a hands-on, experimental lab environment
  • Ability to formalize your work and shape concepts at the relevant abstraction level
  • Ability to develop and document methods, standards, and guidelines
  • Ability to clearly articulate and communicate your ideas, in written and spoken English

What we offer

  • Social: Frequent social events, snacks and drinks
  • Transportation allowance: commuter allowance to contribute to your preferred means of transportation
  • Lunch vouchers: meal allowance with Swile
  • Vacation: 1 day off for every full month of work, in addition to national holidays
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