Senior Blockchain Engineer

As a Senior Blockchain Engineer at ether.fi, you design and build smart contracts that protect billions of dollars in user assets across our Stake, Liquid, Cash, and Lend products. You review changes that matter most, help shape how we deploy and monitor on-chain systems, and work closely with engineering leadership to influence our security practices from day one.

What you'll do

• Design, build, and own smart contracts and backend systems 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

What you bring

• Leadership experience on a smart contract team and dapps operations
• Strong programming and design skills in Solidity
• A track record building sophisticated DeFi applications from scratch and operating them in production
• Strong fundamentals in software engineering and problem solving
• Deep obsession with security: you care about secure smart contract code and think deeply about edge cases and failure modes
• Strong understanding of upgrade patterns, access control, oracle 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
• Heavy and reliable use of AI tools to review code, investigate issues, and automate operational work

What we offer

• Competitive salary, performance-based incentives, and token allocation grant
• Health, dental, and vision insurance plans
• 4 weeks work from anywhere annually
• Global team with opportunity for travel and working out of our 3 offices around the world
• Collaborative and inclusive work culture

About ether.fi

ether.fi is a decentralized finance platform on a mission to put users in control of their wealth. The platform offers a fully integrated, non-custodial suite of products: Stake, Liquid, Cash, and Lend, bridging crypto utility with real-world convenience.