Software Security Engineer, Ledger

Ledger

Location:
France, Paris

Category:
IT - Software Development

Contract Type:
Not provided

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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Software Security Engineer