About us

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.

Position Overview

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’ll Work On

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

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

You Might Be a Fit If You

Led a smart contract team and the dapps operations

Strong programming & design skill in Solidity

Built sophisticated DeFi apps from scratch and operated

Strong fundamentals in software engineering & enjoys problem solvings.

Obsessed with Security: Care about secure smart contract code, and think deeply about edge cases and failure modes.

Strong understanding of upgrade patterns, access control, oracle and risks, cross-chain messaging, and common DeFi attack vectors

Experience operating with multisigs, timelocks, and governance flows in production

Sound judgment on tradeoffs between safety and shipping speed, and the ability to explain them clearly

You use AI tools heavily and reliably to review code, investigate issues, and automate operational work

Benefits

Competitive salary, performance-based incentives, and token allocation grant

Health, dental, and vision insurance plans

Collaborative and inclusive work culture

Exposure to cutting-edge technologies in the blockchain and cryptocurrency space

Global team with opportunity for travel and working out of our 3 offices around the world

4 weeks work from anywhere