Staff/Senior Security Engineer (DeFi)

TL;DR

Staff/Senior Security Engineer (DeFi): Leading the signing and treasury security program across wallets and custodian accounts with an accent on verification layers and on-chain truth. Focus on engineering safe operational workflows, managing allowlist infrastructure, and reducing operational failure modes in custodian signing flows.

Location: Globally Remote

Company

hirify.global is building a suite of digital dollar products, including the synthetic dollar USDe and institutional iUSDe, aiming to upgrade money for the internet era.

What you will do

• Own the end-to-end design of the signing regime and evolve pre-signature verification workflows for destination and state-change confirmation.
• Manage and upgrade the canonical address and contract allowlist system and the infrastructure managing it.
• Operate real-time monitoring across wallets and DeFi positions, integrating them with SOC 2 incident-response workflows.
• Run independent technical reviews of new protocol integrations and maintain the risk register.
• Verify ERC-20 approval hygiene across the treasury and automate reconciliation between on-chain activity and accounting systems.
• Produce high-quality documentation of controls and tooling for auditors and institutional counterparties.

Requirements

• Mastery of Solidity and the EVM, with the ability to read arbitrary contracts and raw calldata.
• Fluency in tools such as Tenderly, Foundry-based simulation, and trace analysis.
• Deep practical experience with Gnosis Safe, Coinbase Prime, Anchorage, and Fireblocks.
• Strong practitioner-level knowledge of DeFi protocols like Aave, Morpho, and Stargate.
• Proven ability to explain technical risks to non-technical stakeholders and executives.
• Security-first mindset and the ability to own infrastructure end-to-end.

Culture & Benefits

• Flexible, remote-friendly work environment.
• Opportunity to join one of the most successful crypto-native companies in the industry.
• Collaboration with a passionate team focused on revolutionizing decentralized finance.
• Established opportunities for personal growth and learning.