Senior Blockchain Engineer

ether.fi is an innovative, rapidly growing crypto-native financial platform on a mission to put users in control of their wealth - making it easy to save, earn, and spend crypto. Positioned as a leading decentralized finance (DeFi) bank, ether.fi offers a fully integrated, non-custodial suite of products - Stake, Liquid, Cash, and Lend - that bridge crypto utility with real-world convenience.

As we continue to scale, we’re actively hiring talented, mission-driven individuals who want to shape the future of finance from the ground up.

Learn more at ether.fi.

We’re looking for an exceptionally strong Senior Smart Contract Engineer with a security focus. You’ll design and build contracts that protect billions of dollars in user assets, review the changes that matter most, and help shape how we deploy, operate, and monitor our on-chain systems. You’ll work closely with engineering leadership and have real influence over our security practices from day one.

• Design, build, and own smart contracts across Stake, Liquid, and Cash, with safety built into the design: limited blast radius, clear access control, and safe upgrade paths

• Review and audit contract changes before they reach mainnet, and serve as a go-to reviewer for the rest of the team

• Work with external auditors from scoping through fix verification

• Help design and improve how we sign transactions, including multisig structure, signer workflows, calldata and transaction hash verification, and timelock usage

• Improve how we run on-chain operations such as upgrades, parameter changes, role grants, fund movements, and bridges, so each follows a clear, reviewable path

• Build monitoring and alerting for contract state, privileged actions, oracle behavior, and anomalous flows, and contribute to incident response playbooks

• Propose and drive security practices and policies, and help other engineers write safer contracts

• Led a smart contract team and the dapps operations