Blockchain Security Expert - Chain Security Evaluation Track

10 months agoSeniorSalary: 120K - 180KUnited States Remote Full Time Cybersecurity Jobs by CertiK

CertiK

CertiK is a Web3 security platform providing blockchain and smart-contract audits, formal verification, compliance and risk intelligence, monitoring, and validator services.

Series B0 current maintainers0 active leadsTeam intelligence

Maintainer signals as of 9/25/2026

New York, New York, United States

Funding history

Series B ($24M)Series B ($24M)Series B ($37M)

Investors

GL Ventures DHVC (Danhua Capital)NGC Ventures Lightspeed Venture Partners Eden Block

Projects

SkynetRisk Assessment

SkyHarborRisk Assessment

SkyInsightsOnchain Compliance and Investigations

SkyNodeStaking Service

Shentu ChainL1

About CertiK

CertiK is a New York-based Web3 security company founded in December 2017 by professors from Yale and Columbia. Its current offerings include smart-contract and blockchain audits, formal verification, penetration testing, DLT security, KYC and regulatory compliance services, SkyInsights risk analytics, Skynet security intelligence, validator operations, AI Auditor, CertiK Hunt, and Skylens.

View jobs by CertiK

Skills

Automation Bash Besu Blockchain Cometbft Consensus Cosmos Sdk Docker Geth Hyperledger Fabric Mempool Node Penetration Testing Python Scripting Security Auditing Validator

Candidate Availability

Remote · Washington · Required

Required and preferred rules are kept separate and reflect the wording in the original posting.

About the Role

You will perform in-depth security evaluations of blockchain nodes, validators, consensus mechanisms, mempool behavior, networking layers, and chain modules. You will review and analyze blockchain frameworks such as Cosmos SDK, CometBFT, Geth, Hyperledger Fabric, and Besu, implement and run custom scripts and test scenarios, simulate validator and network behaviors, and identify chain-level vulnerabilities. You will use scripting and automation to create repeatable tests, work with containerized environments, and contribute findings and remediation recommendations during client engagements.

Requirements

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

Responsibilities

Conduct in-depth security evaluations of blockchain nodes and validators
Analyze consensus mechanisms, mempool behavior, networking layers, and chain modules
Review and analyze blockchain frameworks such as Cosmos SDK, CometBFT, Geth, Hyperledger Fabric, and Besu
Identify security issues related to consensus safety, chain halting, permission model flaws, and block production vulnerabilities
Implement and run custom scripts and test scenarios to simulate validator and network behaviors, chain stress conditions, and edge cases

Benefits