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Software Security Engineer

https://www.ledger.com Logo

Ledger

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Location:
France, Paris

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

1500.00 EUR / Month
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Job Description:

Internship position for a Security Engineer to work on security assurance tooling for applications that run on Ledger devices. The role involves researching and implementing automated security analysis techniques, building benchmarks, refining tools including potential use of LLMs, and integrating work into CI pipelines for production code.

Job Responsibility:

  • Research and implement various automated security analysis techniques including fuzzing, static analysis or symbolic execution
  • Build up a benchmark to compare and identify the most relevant solutions in the context of embedded applications
  • Refine and extend existing tools with opportunities to explore the use of LLMs
  • Integrate and deploy work into CI pipelines
  • Contribute to security reviews of new embedded applications or features
  • Develop new fuzzing harnesses or improve on existing ones
  • Present work and results internally and to engineering teams

Requirements:

  • Experience in C (mandatory)
  • Strong understanding of memory corruption and undefined behaviour
  • Strong understanding of established automated security analysis techniques (fuzzing, abstract interpretation based static analysis, symbolic execution)
  • Good knowledge of exploitation techniques and mitigations
  • Basic understanding of LLMs and curiosity about their use in security evaluation
  • Ability to formalize and effectively communicate work in written and spoken English
  • Basic working knowledge of Git
What we offer:
  • Social events, snacks and drinks
  • Transportation allowance
  • Lunch vouchers with Swile
  • Vacation: 1 day off for every full month of work in addition to national holidays

Additional Information:

Job Posted:
November 06, 2025

Employment Type:
Fulltime
Work Type:
On-site work
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