Andre Cronje

Andre Cronje is a software developer and entrepreneur known for his contributions to the decentralized finance (DeFi) sector within the digital asset industry. He has a background in computer science and has been involved in software development and technology consulting.

Cronje gained attention in the blockchain community through his work on various DeFi projects. He is most recognized for founding and developing Yearn Finance, a decentralized platform that optimizes yield farming strategies for users by automatically shifting funds between different lending and liquidity protocols. Yearn Finance has been noted for its innovative approach to enhancing yield and its governance model, which involves the use of a native token, YFI, for decision-making and protocol upgrades.

Cronje has been involved in controversies, particularly for "test in production" — a phrase Cronje used as a risk warning for experimental or developer-facing deployments, some of which were technically accessible on mainnet before a formal public release. His projects had different release and review statuses: multiple production systems received published third-party audits, while other work remained beta, experimental, or pre-production. Eminence, for example, involved unreleased pre-production contracts deployed on Ethereum mainnet before an official product launch. Following publication, Cronje disputed the characterization that the code was unaudited. Audit status varied by project, version, commit, and scope.

In addition to Yearn Finance, Cronje has been involved in other projects like Sonic (formerly Fantom) and Keep3r.

Cronje has publicly said that regulatory pressure and requests for information contributed to his 2022 decision to step back from public DeFi. The SEC Division of Enforcement investigation concerning Yearn Finance was concluded as to Yearn in March 2025, with staff not intending to recommend enforcement action against Yearn based on information then available, subject to the Release No. 5310 caveat. Although he publicly distanced himself from Fantom in 2022, he later clarified that he never truly left the project but did so to avoid negative press.

Additionally, Cronje has advocated for regulated crypto, emphasizing the need for a framework where cryptocurrency businesses operate under national regulations.