Senior Cryptography Engineer (Post-Quantum Cryptography)

Location: Onsite in Geneva, Switzerland

Company

hirify.global is a quantum platform company delivering integrated quantum computing, networking, sensing, and security solutions; ID Quantique, part of hirify.global, develops quantum-safe communications and post-quantum security products.

What you will do

• Implement and maintain reference, bit-accurate, and optimized software models for ML-KEM, ML-DSA, SLH-DSA, and LMS.
• Develop constant-time cryptographic functions in C, C++, Rust, and Python.
• Build known-answer-test and test-vector tooling using NIST ACVP for verification and CAVP certification.
• Decompose algorithms into hardware-friendly components such as Keccak, NTT, polynomial arithmetic, samplers, and encoding/decoding.
• Support RTL and firmware engineers with algorithm expertise, debugging, and certification-oriented development.
• Evaluate third-party cryptographic libraries and contribute to HSM and network-appliance products.

Requirements

• Master’s degree in Cryptography, Mathematics, Computer Science, or a related field; a PhD is an advantage.
• At least five years of experience implementing cryptographic algorithms or security-critical software.
• Strong hands-on experience with C, C++, or Rust and solid knowledge of modern cryptographic primitives.
• Understanding of constant-time implementation and secure, well-tested software development.
• Fluency in English is required.
• First exposure to post-quantum cryptography, lattice-based or hash-based schemes, and their underlying mathematics is preferred.

Nice to have

• Familiarity with NIST test-vector formats, CAVP, ACVP, or certification-oriented development.
• French or German language skills.
• PhD in a relevant technical field.

Culture & Benefits

• Flexible work models alongside an onsite role based in Geneva.
• Training, professional development, and career planning within the hirify.global group.
• Collaboration with a global team of quantum and cryptography experts.
• Competitive compensation, benefits, and equity plan.
• Medical, dental, and vision coverage, matching 401(k), unlimited PTO, paid holidays, parental and adoption leave, legal insurance, and a home technology stipend.