Blockchain Engineer

What you'll work on

Vaults

• Design, write, deploy, and configure yield vault smart contracts alongside the rest of the vault team
• Build vault tooling: putting on trades, rebalancing across strategies, updating vault policies and whitelists, admin configuration
• Extend the vault architecture as new yield strategies, assets, and chains come online
• Review teammates' contracts and tooling, and get reviewed in turn
• Prove the contracts do what they claim: unit and fuzz tests, invariants, and formal verification where it earns its keep
• Work with external auditors through review cycles, and write contracts that are straightforward to audit in the first place

Backend services

• Build and maintain the critical systems that run 365/24/7 without failure: the solver powering redemption flows, including the liquidity buffer, report NAV changes, security concerns and unwind logic behind them
• Build and maintain the NAV service, pricing every position a vault holds, and the accuracy guarantees behind the share price
• Automate on-chain operations so allocation, harvesting, and rebalancing run reliably without a human in the loop

Risk and protocol operations

• Own the new-protocol review pipeline: given a new protocol, read the docs and contracts, assess the risk, and decide whether and on what terms we allocate
• Review and sign vault rebalancing transactions as a multisig signer
• Build monitoring and automation that catches a broken oracle, a depeg, a stuck withdrawal, or a bad allocation before users do
• Participate as a security guardian across [ether.fi](http://ether.fi)'s web3 stack and operations

You might be a fit if you

• Write strong production Solidity: clean, secure, and designed around edge cases and failure modes
• Are equally strong on the backend: services, automation, and tooling that hold up when they're running against real money
• Know DeFi deeply enough to read a protocol's docs and contracts, understand where the yield actually comes from, and form your own view on where it breaks
• Have 4+ years of industry engineering experience
• Have shipped a real yield vault (ERC-4626, BoringVault-style, or your own architecture) and operated it after launch
• Thrive in fast-moving environments where the best idea wins

Bonus

• Experience at a vault platform, asset curator, or yield product with real TVL, either building the vaults or curating what goes into them


• Hands-on with the strategies themselves: lending markets, LSTs and LRTs, basis and funding trades, stablecoin yield


• Audit or security review background


• You've hacked on this for fun: your own contracts, protocol audits, MEV bots, or just a lot of hours across DeFi protocols