Senior Cryptography Engineer

ionq · Geneva

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Company
ionq
Location
Geneva
Posted
October 2, 2026

About this job

We are looking for a Staff Cryptography Engineer to join our team building post-quantum cryptography (PQC) hardware acceleration for HSM and network-appliance products. You will implement the software side of modern post-quantum algorithms: reference models, optimised implementations, and the test infrastructure that proves they are correct. This is a hands-on development role at the heart of applied cryptography, working with some of the most experienced cryptographic engineers in the field. Responsibilities: You will implement and maintain reference and bit-accurate models of ML-KEM, ML-DSA and SLH-DSA/LMS in C/C++/Rust and Python, develop constant-time software implementations of cryptographic functions, and build out the known-answer-test and test-vector tooling (NIST ACVP) used for…

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