Senior Cryptography Engineer - Post-Quantum & FPGA

CryptoNext Security; Paris; Hybride; EUR 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Ownership of strategic project

Global high-growth startup

Based in Paris

Résumé du poste

CryptoNext Security in Paris seeks a senior Cryptography R&D Engineer to port the Quantum Safe Library across platforms and accelerators. You will work at the intersection of cryptography, low-level C, and embedded hardware, delivering high-performance, secure implementations.

You will collaborate with international teams, drive test strategies, and contribute to certifications while advancing post-quantum technology on multiple architectures and OS targets.

Qualifications

• Significant senior cryptography engineering experience in software or hardware contexts.
• Strong programming in C with low-level optimization skills.
• Experience porting libraries across platforms and validating security properties.
• Fluency in French and English, written and spoken.

Responsabilités

• Design and implement efficient C code for post-quantum algorithms with emphasis on performance and security.
• Port the CryptoNext Quantum Safe Library (C-QSL) across platforms and architectures.
• Adapt implementations for constrained embedded environments (IoT, Cortex-M, embedded Linux).
• Define tests and validation strategies for functional, performance, and security aspects.
• Support security certifications (CSPN, Common Criteria, FIPS) for ports.
• Document work through technical reports and occasional scientific papers.

Connaissances

Cryptography engineering

C programming

Embedded systems

Low-level optimization

OpenSSL experience

French & English comms

Formation

Engineering degree or Master’s in CS/Math

PhD in Cryptography (strong plus)

Outils

GCC

GDB

QEMU

JTAG

GitLab CI

Description du poste

CryptoNext Security in Paris seeks a senior Cryptography R&D Engineer to port the Quantum Safe Library across platforms and accelerators. You will work at the intersection of cryptography, low-level C, and embedded hardware, delivering high-performance, secure implementations.

You will collaborate with international teams, drive test strategies, and contribute to certifications while advancing post-quantum technology on multiple architectures and OS targets.