Euler Finance is a modular lending platform — described as "the credit layer for programmable finance" — that enables users to lend, borrow, and swap any asset without limits, using any asset as collateral with customizable risk parameters. Its core infrastructure consists of two key components: the Euler Vault Kit (EVK), which allows anyone to create and deploy custom lending vaults and markets within minutes, and the Ethereum Vault Connector (EVC), which enables vaults to be used as collateral for other vaults, unlocking highly composable and capital-efficient lending strategies. The platform is built with developers as a primary audience, offering a full suite of tools for building custom DeFi lending protocols on top of Euler's infrastructure, with open-source code on GitHub and comprehensive documentation. Euler is backed by Wintermute Ventures and features a $7.5 million bug bounty program, underscoring its focus on security through rigorous auditing and community-driven vulnerability reporting.