Principal Engineer - Classical Cryptography & Architecture

Principal Engineer - Classical Cryptography & Architecture About IonQ:

IonQ, Inc. [NYSE: IONQ] is the world’s leading quantum platform and merchant supplier — delivering integrated quantum solutions across computing, networking, sensing, and security. IonQ’s newest generation of quantum computers, the IonQ Tempo, is the latest in a line of cutting‑edge systems that have been helping customers and partners including Amazon Web Services, and AstraZeneca achieve 20x performance results and accelerate innovation in drug discovery, materials science, financial modeling, logistics, cybersecurity, and defense.

In 2025, the company achieved 99.99% two‑qubit gate fidelity, setting a world record in quantum computing performance.

Headquartered in College Park, Maryland, IonQ has operations in California, Colorado, Massachusetts, Tennessee, Washington, Italy, South Korea, Sweden, Switzerland, Canada, and the United Kingdom. Our quantum computing services are available through all major cloud providers, while we also meet the needs of networking and sensing customers across land, sea, air, and space. IonQ is making quantum platforms more accessible and impactful than ever before.

Location: This role is based onsite in Geneva, Switzerland.

Travel:

(IDQ), part of IonQ, is a global leader in quantum-safe communications. We provide solutions to protect governments, telecommunication infrastructures, and banking & financial institutions from the “harvest‑now, decrypt‑later” threat, delivering both terrestrial and space-based quantum-safe networks in live operation globally.

We are looking for a Principal Engineer to own the classical cryptography architecture of our post‑quantum cryptography (PQC) hardware acceleration products, targeting hardware security module (HSM) and network‑appliance applications. Real‑world quantum‑safe systems are hybrid systems: classical and post‑quantum algorithms operating side by side, with careful key management, crypto agility and migration paths. You will be the senior authority for this classical and hybrid layer, working alongside our PQC architecture leadership.

The role demands fluency on both sides of the transition: deep classical mastery combined with a solid working command of the post‑quantum algorithms and standards the products are built around.

You will own the architecture and implementation strategy of the classical cryptographic functions of the product line: symmetric ciphers and modes (AES/GCM and beyond), hash functions (SHA‑2/SHA‑3, HMAC/KDF constructions), RSA/ECC offload, and true random number generation and entropy architecture (SP 800‑90A/B/C). You will define the hybrid classical/post‑quantum schemes (key establishment, dual signatures, composite certificates) and the crypto‑agility mechanisms that allow customers to migrate safely, track the standardisation of hybrid and composite approaches (NIST guidance, IETF work on hybrid key establishment in TLS 1.3 and IKEv2, composite certificates) together with our PQC architects, guide RTL and software engineers implementing classical cores, technically evaluate third‑party IP, and support FIPS 140‑3 and CAVP certification of the classical algorithm suite.

You will also own key‑management and key‑hierarchy architecture across the product, ensuring interoperability with deployed HSM, TLS and IPsec ecosystems.

• Own the classical and hybrid cryptography architecture of the product line: symmetric, hash, RSA/ECC, entropy and key management, and classical/PQC hybrid schemes
• Define crypto‑agility and migration mechanisms that let customers move to quantum‑safe deployments without breaking existing infrastructure

We are looking for a candidate with a Master’s or PhD in…