Staff/Senior Security Engineer - DeFi

Ethena Labs is actively building and deploying a suite of groundbreaking digital dollar products aiming to upgrade money into the internet era. Our flagship product, USDe, is a synthetic dollar backed by digital assets, and takes the novel approach of using a delta-neutral hedged basis strategy to maintain its peg. This product scaled from zero to $15b in 18 months. Expanding on this, iUSDe is designed specifically for traditional financial institutions, incorporating necessary compliance features to enable them to access the crypto-native rewards our protocol generates, in an institutional-friendly manner. Ethena has also developed USDtb: a fiat backed GENIUS compliant stablecoin in partnership with BlackRock which has scaled to ~$2b. These products are also offered in a whitelabel stablecoin offering where any application, chain, wallet or exchange can launch their own stablecoin on Ethena's back-end infrastructure. Through these offerings, Ethena Labs is not just creating new financial products; we are building the foundational infrastructure for a more open, efficient, and interconnected global financial system.

### What You’ll Do: - Own the end-to-end design of our signing regime, including signer composition, thresholds, and intent communication, and continue evolving our pre-signature verification workflows for destination, calldata, and state-change confirmation. - Manage, maintain and continuously upgrade canonical address and contract allowlist system and infra that manages it, ensuring every whitelisting or approval action is checked against this list pre-signature, requiring documented review for any additions. - Operate and tighten real-time monitoring across wallets, custodians, and DeFi positions, keep it integrated with our SOC 2 incident-response workflows, and contribute to playbooks for evolving risk scenarios. - Run independent technical reviews of new protocol integrations and keep our risk register current as positions and dependencies evolve. - Continuously verify ERC-20 approval hygiene across the treasury, and partner with Finance on automated reconciliation between on-chain activity and accounting systems. - Own the process of producing the documentation of controls, tooling, and decisions that our auditors, underwriters, and institutional counterparties expect.

### What We’re Looking For: - Mastery of Solidity and the EVM; you can read arbitrary contracts and raw calldata without assistance. You are fluent in tools such as Tenderly, Foundry-based simulation, and trace analysis. - Deep practical experience with Gnosis Safe, Coinbase Prime, Anchorage, and Fireblocks. Strong understanding of the operational failure modes inherent in browser-based custodian extensions and hardware wallet signing flows. - Strong practitioner-level knowledge of DeFi protocols like Aave, Morpho, and Stargate. You understand risk parameters, oracle structures, and bridge message-passing mechanics. - A security-first mindset that assumes a hostile environment by default. You possess a "vigilance disposition" - you are energized by rigorous verification and are committed to maintaining safety standards even when facing operational pressure. - Proven ability to explain technical risks to non-technical stakeholders (COO team, executives, auditors). You are a self-starter comfortable owning infrastructure end-to-end and producing high-quality, audit-grade documentation.

### Why Ethena Labs? - You'd be joining a group that has well established itself as one of the most successful crypto-native company's of all time, a group with a mission to revolutionise decentralised finance and it's position in global finance. - Work alongside a passionate and innovative team that values collaboration and creativity. - Enjoy a flexible, remote-friendly work environment with established opportunities for personal growth and learning.

Ethena Labs is a decentralized finance protocol built on Ethereum that issues synthetic dollar assets designed to function independently of traditional banking infrastructure. Its core product is USDe, a synthetic dollar backed by crypto collateral and delta-hedged derivatives, alongside sUSDe, a yield-bearing Internet Bond, and USDtb, a fiat-backed stablecoin.