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Principal Security Engineer
DFNS
USD 140,000 - 240,000 / year
Paris, New York
About this role
Responsibilities
- Lead product security architecture across the platform, ensuring security is embedded into core system design.
- Analyze and secure the platform's key management, signing workflows, and transaction pipelines.
- Conduct system-level threat modeling for new features, protocols, and blockchain integrations.
- Design and review security-sensitive components such as auth systems, authorization models, and cryptographic workflows.
- Define and implement defense-in-depth controls across application, infrastructure, and protocol layers.
- Own and expand software supply-chain security, from dependency scanning in CI to package scanning on developer laptops.
- Drive infrastructure and security configuration into version-controlled code in GitHub to eliminate configuration drift.
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