Blockchain Security Expert - Chain Security Evaluation Track

US / RemoteFull-TimeMid-levelOther

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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.

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.

Opportunity to shape the national conversation on blockchain and security.
Collaborate with industry-leading security researchers, technologists, and global institutions.
Flexible work environment and mission-driven culture.