[Hiring] Zero Knowledge/Cryptography Auditor @Nethermind

Role Description

As a Zero Knowledge/Cryptography Auditor, you will evaluate the correctness, soundness, and security of cryptographic protocols and ZK systems. Your work will span Ethereum and Aztec ecosystems, including primitives, zkDSLs, and zkVM guest code.

• Perform security reviews and audits of cryptographic and zero-knowledge systems, including primitives, protocols, zkDSL circuits, and zkVM guest programs.
• Analyze correctness, soundness, completeness, and potential privacy leakage in ZK programs.
• Review production code used in Ethereum and Aztec ecosystems and help teams identify and remediate vulnerabilities.
• Collaborate with teammates to maintain and improve Nethermind’s internal blockchain security tooling.
• Design and implement new security tools for cryptography and ZK systems.
• Stay up to date with emerging ZK constructions, proof systems, and attack vectors.
• Participate in client meetings to explain findings, recommend best practices, and support remediation efforts.
• Contribute to internal knowledge sharing, research notes, and (optionally) public-facing content.

Qualifications

• 1+ year of experience performing security reviews related to cryptography, zero-knowledge systems, or closely related domains.
• Bachelor’s or Master’s degree in Computer Science, Cyber Security, Mathematics, or a related field.
• Strong foundation in cryptography, including:
• Solid theoretical understanding of cryptographic primitives and protocols.
• Practical experience implementing and/or auditing cryptographic systems.
• Strong proficiency in Rust (experience auditing Rust codebases is a strong plus).
• Deep understanding of Zero-Knowledge systems, including:
• Hands-on experience with at least one ZK proof system (e.g. Groth16, PLONK, Halo2, Bulletproofs).
• Proven usage of at least one zkDSL (e.g. Circom, Noir, Halo2, Cairo, etc.).
• Understanding of zkVM architectures and proof pipelines.
• Ability to identify common cryptographic and ZK vulnerabilities.
• Strong debugging skills; experience with reverse engineering is a plus.
• Clear written and verbal communication skills.

Requirements

• Multiple years of experience in traditional cybersecurity before moving into blockchain (nice to have).
• Experience reviewing or implementing advanced cryptographic primitives such as:
• Threshold signatures.
• Fully Homomorphic Encryption (FHE).
• Anonymous credentials.
• Familiarity with or experience working on ZK rollups or L2s (e.g. Aztec or similar systems).
• Publicly available audit reports, blog posts, or presentations on cryptography or ZK security.
• Experience working in client-facing security roles.

Benefits

• Flexible Work Options: Remote-first culture with the opportunity to work from anywhere.
• Global and Diverse Workforce: You'll work with people from various backgrounds and cultures.
• Learning and Development: You'll work on innovative, challenging projects and have access to experts and mentors to enhance your skills.
• Career Growth: Access to training, mentorship, and opportunities to contribute to open-source initiatives.
• Global Events and Conferences: Opportunities to attend the industry events.
• Collaborative and Innovative Culture: We foster teamwork and encourage new ideas.