Senior Smart Contract Engineer – Security‑Focused DeFi Expert

ether.fi; Denver (CO); On-site; USD 120,000 - 230,000; Full time

Benefits offered by this job

Token allocation grant

Health, dental, and vision insurance

Global offices

Job summary

ether.fi, a crypto-native financial platform, seeks a Senior Smart Contract Engineer with a security-first mindset. You will design, build, and own contracts across Stake, Liquid, and Cash, ensuring safety and upgradeability.

You will review changes with external auditors and shape signer workflows, timelocks, and governance across on-chain operations. You will lead security practices, monitor contract states, and collaborate with engineers to write safer code while scaling DeFi capabilities.

Qualifications

• 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 solving.
• Obsessed with Security: Care about secure smart contract code and edge cases.

Responsibilities

• Design, build, and own smart contracts/backend across Stake, Liquid, and Cash with safety-first design.
• Review and audit contract changes before mainnet; serve as go-to reviewer.
• Collaborate with external auditors from scoping through fix verification.
• Improve sign transactions, multisig structure, timelock usage, and governance flows.
• Improve on-chain operations like upgrades and fund movements with clear reviewable paths.
• Build monitoring and alerting for contract state and privileged actions; contribute to incident response playbooks.
• Propose and drive security practices and policies for engineers.

Skills

Solidity

Smart contract design

Security

DeFi experience

Auditing

Job description

ether.fi, a crypto-native financial platform, seeks a Senior Smart Contract Engineer with a security-first mindset. You will design, build, and own contracts across Stake, Liquid, and Cash, ensuring safety and upgradeability.

You will review changes with external auditors and shape signer workflows, timelocks, and governance across on-chain operations. You will lead security practices, monitor contract states, and collaborate with engineers to write safer code while scaling DeFi capabilities.