Smart Contract Lead

ether.fi

Toronto, Canada / Denver, USA / Cayman IslandsContract2026-10-16 → 2026-11-10

Hybrid

Core

Design, develop, deploy, test, and audit secure smart contracts on Ethereum/L2 blockchains for a DeFi platform.

Role type

Senior Smart Contract Engineer (Solidity)

Builds

Non-custodial DeFi products (Stake, Liquid, Cash) and blockchain infrastructure

Domain

Decentralized Finance (DeFi) / Blockchain

Required skills

Solidity, Smart Contract Security, Cryptography (Zero-Knowledge Proofs, Roll-ups), Foundry, Hardhat, DevOps

Preferred skills

Advanced degrees in CS/Engineering, Experience with Ethereum development tools, DevOps practices for blockchain

Technologies

Ethereum, L2 blockchains, Solidity, Foundry, Hardhat, Forge

Responsibilities

Design and deploy smart contracts optimized for gas consumption; Conduct testing and auditing of smart contracts; Contribute to internal best practices for smart contract development; Participate in code reviews; Assist in blockchain infrastructure development

Seniority

Senior, hands-on IC

About ether.fi

50 Employees

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 , and Cash —that bridge crypto utility with real-world convenience. With over $8B in assets under management and a lean, agile team of 25+, we’re building sustainable, secure, and scalable financial infrastructure to onboard the next billion users to crypto. Our offerings include