Senior Security Engineer – DeFi

Ethena Labs

Staff/Senior Security Engineer leading signing and treasury security program at Ethena Labs. Collaborating with DeFi and trading teams in a crypto-native environment.

Posted 5/23/2026full-timeRemote • 🇵🇹 PortugalSeniorWebsite

Tech Stack

Tools & technologies

Solidity

About the role

Key responsibilities & impact

Own the end-to-end design of our signing regime
Manage, maintain and continuously upgrade canonical address and contract allowlist system
Operate and tighten real-time monitoring across wallets, custodians, and DeFi positions
Run independent technical reviews of new protocol integrations
Continuously verify ERC-20 approval hygiene across the treasury

Requirements

What you’ll need

Mastery of Solidity and the EVM; you can read arbitrary contracts and raw calldata without assistance
Deep practical experience with Gnosis Safe, Coinbase Prime, Anchorage, and Fireblocks
Strong practitioner-level knowledge of DeFi protocols like Aave, Morpho, and Stargate
A security-first mindset that assumes a hostile environment by default
Proven ability to explain technical risks to non-technical stakeholders

Benefits

Comp & perks

Flexible, remote-friendly work environment
Established opportunities for personal growth and learning

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

SolidityEVMERC-20DeFi protocolstechnical reviewscontract integrationsreal-time monitoringapproval hygiene

Soft Skills

security-first mindsetcommunicationstakeholder engagement