Staff Cryptography Engineer (Post-Quantum Cryptography)

Location: Onsite in Geneva, Switzerland

Company

hirify.global develops integrated quantum computing, networking, sensing, and security solutions for customers across industries including drug discovery, materials science, financial modeling, logistics, cybersecurity, and defense.

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 implementations 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 building blocks including Keccak, NTT, polynomial arithmetic, samplers, and encoding/decoding components.
• 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 C, C++, or Rust development skills and a solid understanding of modern cryptographic primitives.
• Understanding of constant-time implementation and its security implications.
• Fluent English required.
• Ability to work onsite in Geneva, Switzerland.

Nice to have

• Experience with post-quantum cryptography, especially lattice-based or hash-based schemes.
• Familiarity with NIST test-vector formats, CAVP, or ACVP.
• French or German language skills.

Culture & Benefits

• Flexible work models alongside an onsite role in Geneva.
• Training, development opportunities, and a career development plan across hirify.global group companies.
• Competitive compensation, benefits, and equity plan.
• Medical, dental, and vision plans, matching 401(k), unlimited PTO, and paid holidays.
• Parental and adoption leave, legal insurance, and a home technology stipend.
• Collaborative environment with a global team of quantum and cryptography experts.