Zero Knowledge/Cryptography Auditor

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Zero Knowledge/Cryptography Auditor in Brazil .

This role offers the opportunity to work at the forefront of blockchain security and cryptographic research, focusing on the evaluation and auditing of zero-knowledge systems that power next-generation decentralized applications. You will be responsible for analyzing the correctness, soundness, and security of complex cryptographic protocols across cutting-edge ecosystems. The position combines deep theoretical cryptography with hands-on engineering, requiring close collaboration with researchers, protocol engineers, and clients. You will contribute to strengthening the security of high-impact blockchain systems while helping design and improve advanced auditing tools. The environment is highly technical, research-driven, and fast-evolving, with constant exposure to new cryptographic innovations. This is a unique opportunity to directly influence the security and reliability of foundational Web3 infrastructure.

Accountabilities:

• Conduct in-depth security audits of cryptographic protocols, zero-knowledge systems, zkDSL circuits, and zkVM guest programs
• Evaluate correctness, soundness, completeness, and privacy guarantees in ZK-based implementations
• Review production-level code across Ethereum, Layer 2, and other blockchain ecosystems to identify vulnerabilities and propose fixes
• Collaborate with security engineers and researchers to improve internal auditing methodologies and tooling
• Design and develop new tools for analyzing and securing cryptographic and zero-knowledge systems
• Stay up to date with emerging ZK frameworks, proof systems, and cryptographic attack vectors
• Participate in client discussions to present findings, recommend mitigations, and support remediation efforts
• Contribute to internal research documentation and knowledge sharing initiatives

Requirements:

• 1+ year of experience in security auditing, cryptography, or zero-knowledge systems
• Degree in Computer Science, Cybersecurity, Mathematics, or a related technical field
• Strong understanding of cryptographic principles, including primitives and protocol design
• Practical experience implementing or auditing cryptographic systems
• Proficiency in Rust, with experience reviewing Rust-based codebases considered a strong advantage
• Hands-on experience with at least one zero-knowledge proof system (e.g., Groth16, PLONK, Halo2, Bulletproofs)
• Experience using at least one zkDSL (e.g., Circom, Noir, Cairo, Halo2, or similar)
• Solid understanding of zkVM architectures and proof generation pipelines
• Strong analytical and debugging skills, with reverse engineering experience considered a plus
• Excellent written and verbal communication skills for technical reporting and client interaction
• Familiarity with advanced cryptographic primitives or prior cybersecurity experience is a plus

Benefits:

• Fully remote, global-first work environment
• Opportunity to work on cutting-edge cryptography and blockchain security systems
• Exposure to leading experts in zero-knowledge and decentralized technologies
• Strong learning and professional development opportunities through mentorship and training
• Participation in global blockchain events and industry conferences
• Collaborative, research-driven, and innovation-focused culture
• Career growth opportunities in a rapidly evolving technical domain
• Inclusive and diverse international team environment

How Jobgether works: We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best!  Why Apply Through Jobgether?    Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.     #LI-CL1