Staff/Senior Security Engineer - DeFi

1 hour, 23 minutes ago
Lead
Cybersecurity
Ethena

Ethena

Ethena provides derivative infrastructure to transform Ethereum into the first crypto-native yield-bearing stablecoin, eUSD, independent of the banking system. Their focus is on enabling the Internet Bond through software development.

Diversified Financial Services
1-10
Founded 2023

Description

  • Own the end-to-end design of the signing regime, including signer composition, thresholds, and intent communication.
  • Develop and continuously improve pre-signature verification workflows for destination addresses, calldata, and state changes.
  • Maintain and upgrade the canonical address and contract allowlist system, including documented review for new additions.
  • Operate real-time monitoring across wallets, custodians, and DeFi positions, and integrate it with SOC 2 incident-response workflows.
  • Contribute to playbooks for evolving security and operational risk scenarios.
  • Run independent technical reviews of new protocol integrations and keep the risk register current as positions and dependencies change.
  • Continuously verify ERC-20 approval hygiene across the treasury.
  • Partner with Finance on automated reconciliation between on-chain activity and accounting systems.
  • Produce audit-grade documentation of controls, tooling, decisions, and security processes for auditors, underwriters, and institutional counterparties.

Requirements

  • Mastery of Solidity and the EVM, including the ability to read arbitrary contracts and raw calldata independently.
  • Fluency with tools such as Tenderly, Foundry-based simulation, and trace analysis.
  • Deep practical experience with Gnosis Safe, Coinbase Prime, Anchorage, and Fireblocks.
  • Strong understanding of browser-based custodian extension and hardware wallet signing flow failure modes.
  • Practitioner-level knowledge of DeFi protocols such as Aave, Morpho, and Stargate.
  • Understanding of risk parameters, oracle structures, and bridge message-passing mechanics.
  • A security-first mindset with a strong bias toward rigorous verification in hostile environments.
  • Proven ability to explain technical risks to non-technical stakeholders, including executives, auditors, and the COO team.
  • Self-starter who can own infrastructure end-to-end and produce high-quality, audit-grade documentation.

Benefits

  • Flexible, remote-friendly work environment.
  • Opportunities for personal growth and learning.
  • Work alongside a collaborative and innovative team.
  • Chance to contribute to a mission focused on decentralised finance and global financial infrastructure.

Interested in this position?

Apply directly on the company website

Apply Now

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