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Blockchain Security Expert - Chain Security Evaluation Track

CertiK· Blockchain Security Engineering
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Remote$120k - $180kFull-timePosted 7mo ago

About the role

Security Engineer focusing on blockchain security offerings, including security consulting, reviews, auditing, verification, and testing across blockchain nodes, frameworks, and networks. Remote, full-time position at CertiK.

Responsibilities

  • 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.

Qualifications

  • 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.

Skills

Required:English communicationBlockchain architecture & node internalsScripting & automationDocker / containerized testing
Nice to have:Web3 security auditing

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
Last updated Oct 23, 2026. Interested? Apply on the company site.

About CertiK

Largest Blockchain Security Auditor - CertiK

CertiK, the largest Web3 security service provider, uses AI and formal verification to protect and monitor smart contracts and protocols, securing the Web3 ecosystem.

Smart Contract AuditSmart Contract SecurityDeFiBlockchain AuditCrypto SecuritySecurity Audit
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