Description:

Yei Finance is a decentralized, non-custodial money market protocol built on the Sei network, designed to provide innovative and flexible financial solutions.
The protocol offers users competitive yield, empowers them to borrow through over-collateralized or flash loans, and enables them to manage risks with advanced tools, leveraging Sei’s speed and cost.
Clovis, the latest product by Yei Finance, reached more than $400M TVL at ATH, generated $5.5M in protocol revenue over the past year, and became the largest protocol on Sei.
Yei launched the first lending-boosted DEX on Sei, where YeiSwap compounds YeiLend yields to drive $230M+ in monthly trading volume and $147M in bridge flow.
The company is seeking an experienced Senior Engineer to join the core development team to lead the design and implementation of a next-generation cross-chain lending protocol.
This role focuses on smart contract security and architecture and the development of critical off-chain services that ensure the protocol’s efficiency and robustness.
Responsibilities include designing, developing, and optimizing DeFi protocols on EVM-compatible chains, developing key backend and off-chain services, tackling cross-chain integration challenges, and producing robust documentation and system architecture diagrams.

Requirements:

Candidates must have 3+ years of smart contract development experience in Solidity, including familiarity with OpenZeppelin standards, Mainnet deployments, and audit collaboration.
Proficiency in Golang or Python is required, with a proven track record in developing high-concurrency or distributed systems.
A deep understanding of the mathematical models and business logic behind DeFi protocols (lending, AMMs, or derivatives) is essential.
Mastery of development tools such as Hardhat / Foundry and related testing frameworks is necessary.
A solid grasp of EVM internals, storage, memory, gas, and transaction lifecycle is required.

Skills