Senior Smart Contract Engineer - Security Focus

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

Benefits offered by this job

Competitive salary

Token allocation grant

Health, dental, and vision insurance

Job summary

ether.fi, a rapidly growing crypto-native financial platform, seeks a Senior Smart Contract Engineer focused on security to design, build, and audit on-chain contracts across Stake, Liquid, and Cash. You’ll influence security practices from day one and collaborate with engineering leadership to protect billions in user assets.

You’ll work on safe upgrade paths, access control, multisig and timelock workflows, and monitoring of on-chain operations, with a strong emphasis on DeFi risk mitigation

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 and problem solving.
• Obsessed with security: secure smart contract code and edge cases.
• Understanding of upgrade patterns, access control, oracle risks, cross‑chain messaging.
• Experience with multisigs, timelocks, and governance flows in production.
• Sound judgment on safety vs. shipping speed; able to explain tradeoffs clearly.
• Experience using AI tools to review code and automate ops.

Responsibilities

• Design, build, and own smart contracts and backend across Stake, Liquid, and Cash.
• Review and audit contract changes before mainnet deployment.
• Collaborate with external auditors from scoping to fix verification.
• Design and improve transaction signing, multisig structure, and timelock usage.
• Improve on-chain operations like upgrades and fund movements with clear processes.
• Build monitoring and alerting for contract state, privileged actions, and oracle behavior.
• Contribute to incident response playbooks and security policies.

Skills

Solidity

Smart contract design

DeFi experience

Security auditing

Multisig workflows

Timelocks

Cross-chain messaging

Job description

ether.fi, a rapidly growing crypto-native financial platform, seeks a Senior Smart Contract Engineer focused on security to design, build, and audit on-chain contracts across Stake, Liquid, and Cash. You’ll influence security practices from day one and collaborate with engineering leadership to protect billions in user assets.

You’ll work on safe upgrade paths, access control, multisig and timelock workflows, and monitoring of on-chain operations, with a strong emphasis on DeFi risk mitigation