Security Researcher

Posted 6 months agoViewed

AnywhereFull-TimeBlockchain Security

Company:Spearbit

Location:Anywhere

Languages:English

Seniority level:Senior, Experienced

Experience:Experienced

Skills:

BlockchainCybersecurityEthereumRustWeb3.jsCross-functional collaboration

Requirements:

Deeply familiar with Solidity, EVM behaviour, and common vulnerability classes Experience with Move, Zk, Cairo, Rust, or low-level protocol implementations (bonus) Experience auditing production smart contracts Experience with cross-chain protocols, bridging, rollups, or ZK systems Familiarity with Ethereum security tooling: Foundry, Echidna, Slither, etc.

Responsibilities:

Perform deep-dive security reviews of smart contracts, protocols, and blockchain infrastructure Analyze protocol designs and identify attack surfaces Reproduce exploits, write POCs, and occasionally contribute patches Publish post-mortems, technical articles, and internal reports