Work - Yearn Finance
The application layer of a leading DeFi protocol
Yearn Finance is one of the original DeFi protocols, with hundreds of millions of dollars managed by its vaults. Its interface and data layer are used every day by thousands of people, and must stay reliable, fast and accurate: a wrong number on screen can cost a user who acts on it.
- merged PRs
- 406
- commits
- 2,300+
- avg TVL over the period
- ~$1.1B
- Yearn repos
- ~30
What Quub delivered
Lead developer of ydaemon: the REST API that aggregates on-chain state and feeds the entire interface
Owner of the frontend stack: yearn.fi, v3 and the shared component library
yearnX: co-branded Yearn portals for partner protocols (Curve, Optimism, Pendle, Morpho, Aerodrome…)
Product UIs: yETH/yLSTeth (ETH staking), yCRV, yBribe, veYFI lockers, ape-tax, yearn-watch
Yearn's Ledger plugin (C device app)
Led a small development team
Tech stack
- React, Next.js, TypeScript
- Wallet integration (wagmi, viem, WalletConnect)
- On-chain reads & event indexing
- Data backends (Go, Node.js)
- Monorepo, CI/CD, tests
Public proof
Contributions under the public identity Majorfi in Yearn's GitHub organization, between September 2021 and April 2025. All public and verifiable.
FAQ
Did Quub write Yearn’s smart contracts?
No. Quub led the application layer: ydaemon (the data API), the entire frontend stack and the product interfaces. The protocol’s smart contracts are the work of other teams.
What was Quub’s role at Yearn?
Lead developer of ydaemon and of the frontend stack, heading a small team, from September 2021 to April 2025. 406 merged PRs and over 2,300 commits, all public on GitHub.
Got a product of this caliber to build?
Last updated: June 2026