All Skills🔥 Tier 2
⚡
OpenZeppelin Security
Category
⚡ Tech
Salary Impact
Complexity
Difficult
Used in
All careers
OpenZeppelin is a library of smart contract implementations for Ethereum and EVM blockchains. Provides battle-tested contracts for common use cases: tokens (ERC-20, ERC-721, ERC-1155), access control, upgradeable proxies, timelock, math utilities. Developers import and extend, avoiding reinvention of secure primitives. Code is audited, tested, and documented. Used by 90% of DeFi protocols ($500B+ TVL).