En un coup d'œil
- Missions: Développez des algorithmes cryptographiques post-quantum en C et optimisez-les pour plusieurs plateformes.
- Entreprise: CryptoNext Security, start-up innovante spécialisée en cryptographie résistante aux ordinateurs quantiques.
- Avantages: Salaire compétitif, travail à Paris, et opportunités de développement professionnel.
- Autres infos: Possibilité de travailler sur des projets de pointe avec une équipe internationale.
- Pourquoi ce job: Relevez des défis techniques impactants dans un environnement dynamique et reconnu mondialement.
- Qualifications: Expérience en ingénierie cryptographique et compétences solides en programmation C.
Le salaire estimé est compris entre 61650 - 75350 € par an.
Who we are
Crypto Next Security is a Paris-based start-up founded in 2019, building on more than 20 years of academic research.
Crypto Next is a software vendor specializing in quantum-computer-resistant cryptography (PQC: post-quantum cryptography).
Its software suite, the Quantum Safe Remediation Suite, includes the world-reference Quantum Safe Library (C-QSL), covering the full selection of NIST algorithms, and helps enterprises and integrators migrate to the era of post-quantum cybersecurity.
Crypto Next Security was cited among the 5 reference leaders in Gartner’s report on post-quantum cryptography (October 2021) and received the Innovation Prize at «Les Assises 2022».
Crypto Next is a member of Campus Cyber, Hexatrust and Systematic, and was selected in 2022 to join a workgroup of the US National Cybersecurity Center of Excellence (NCCo E) dedicated to PQC migration best practices.
We are looking for a highly motivated, senior Cryptography R&D Engineer to join our team and take ownership of a key strategic project: porting our post-quantum cryptographic library across multiple platforms, with a particular focus on hardware/software FPGA accelerators.
This role sits at the intersection of cryptography, low-level C engineering and embedded/hardware design.
- On a daily basis, you will
- Design and implement efficient C code for post-quantum cryptographic algorithms (NIST-selected or recommended by EU agencies), balancing performance, portability and security.
- Port and optimize the Crypto Next Quantum Safe Library (C-QSL) across multiple platforms and architectures
- Adapt implementations for constrained and embedded environments (e. g., Io T, Cortex-M, embedded Linux).
- Define and run test and validation strategies (functional, performance, security) across all target platforms.
- Support security certification processes (CSPN, Common Criteria, FIPS) for the ported implementations.
- Document your work through technical reports and, where relevant, scientific papers.
- Collaborate closely with the R&D team and cross-functional teams to solve complex technical challenges.
The Crypto Next Quantum Safe Library is developed mainly in C and Assembly, targeting several operating systems (Linux, Windows, i OS, Android…) and processor architectures (x86, Arm, RISC-V…), as well as FPGA-based hardware accelerators.
Other tasks may include, depending on your profile and the product roadmap: work on side-channel countermeasures, and collaboration with the team in charge of integrating the library with communication protocols and cryptographic objects (TLS, IPsec, PKCS#11, X.509…) in post-quantum or hybrid mode.
- The skills you will demonstrate
- Significant, senior-level experience in cryptography engineering, ideally 5+ years, gained in a software company or department of a larger organization (cybersecurity vendor, IT application or hardware provider), ideally with international teams or clients.
- Engineering degree or Master’s in computer science, mathematics or a related field; a Ph D in cryptography or a related discipline is a strong plus.
- Solid foundations in algorithmics and algebra, with the ability to translate mathematical constructs into efficient, correct implementations.
- Strong programming skills in C; comfort working close to the hardware and optimizing for performance and security.
- Comfort using embedded development and hardware debugging tools (GCC, GDB, QEMU, JTAG…) and practical experience with source code management and continuous integration using Git Lab CI.
- Experience with public-key cryptography, symmetric-key cryptography, hash functions, and cryptographic protocols/frameworks such as Open SSL is a plus.
- Experience in one or more of the following is a strong plus: embedded software development, hardware/software co-design, FPGA implementation.
- Good French & English communication skills, both oral and written.
- What's in it for you at Crypto Next
- Ownership of a strategic, high-impact technical challenge — multi-platform porting and hardware acceleration — at the heart of our product roadmap.
- A fast-growing, globally recognized deep-tech start-up, named among Gartner’s 5 reference leaders in post-quantum cryptography.
- Full-time position, based in Paris.
- Competitive salary, commensurate with experience.
- #J-18808-Ljbffr
Senior Cryptography Engineer - C developper in Paris employeur : CryptoNext Security
CryptoNext Security est un employeur exceptionnel, offrant à ses employés l'opportunité de travailler sur des défis techniques stratégiques dans le domaine de la cryptographie post-quantique. Située à Paris, cette start-up en pleine croissance favorise une culture de collaboration et d'innovation, tout en offrant des opportunités de développement professionnel et un environnement de travail dynamique. Les employés bénéficient d'un salaire compétitif et d'une reconnaissance mondiale dans le secteur de la cybersécurité, ce qui en fait un lieu de travail significatif et gratifiant.
