Senior Blockchain Engineer
Ether.fi, Cayman +2
The role
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.
What you will do
- Design, build, and own smart contracts/backend 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