Blockchain Security Expert – Chain Security Evaluation Track

🕒 November 17, 2025

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CertiK

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2018

🌐 Web 3

🔐 Security

₿ Crypto

💰 $60M Series B on 2022-04

Web 3 • Security • Crypto

CertiK is leading the charge in enhancing security within the Web3 ecosystem. As the industry's foremost smart contract auditor, CertiK provides a comprehensive suite of tools designed to secure the Web3 space at scale. Their services include code security audits, smart contract audits, and blockchain audits, with an emphasis on provable trust and comprehensive security evaluations. With a track record of serving thousands of clients and scrutinizing numerous projects, CertiK is recognized for its formal verification expertise, including groundbreaking work in zero-knowledge proofs (zkProofs) and partnerships to strengthen blockchain integrity. They offer advanced services like KYC, penetration testing, and risk management, while maintaining compliance with prominent standards like SOC 2 and ISO 27001. CertiK has been acknowledged by tech giants like Apple and Samsung for its contributions to securing tech ecosystems.

📋 Description

• Conduct in-depth security evaluations on blockchain nodes, validators, consensus mechanisms, mempool behavior, networking layers, and chain modules. • Review and analyze blockchain frameworks such as Cosmos SDK, CometBFT, Geth, Hyperledger, and other L1/L2/L3 infrastructures. • Identify security issues related to consensus safety, chain halting, permission models flaws, block production vulnerabilities. • Implement and run custom scripts and test scenarios to simulate real-world validator/network behaviors, chain stress conditions, and edge cases.

🎯 Requirements

• Strong written and spoken English communication skills. • High diligence and strong attention to detail, especially in multi-step testing and long-running experiments. • Solid understanding of blockchain architecture and node internals (e.g., Cosmos SDK / CometBFT, Go-Ethereum (Geth) internals, and Hyperledger Fabric / Besu) • Strong scripting & automation skills with Python or Bash • Familiarity with Docker and containerized testing environments. • Prior experience in manual Web3 security auditing is preferred, but not required.

🏖️ Benefits

• medical, vision, and dental insurance • 401(k) plan with company matching • life and accidental death and dismemberment insurance • HSA (with high deductible plan) • FSA • flexible paid time off and holidays • variable commission program for business development sales roles