Security Engineer

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About this role

Security Engineer USA (Remote), United States Mysten Labs believes that decentralized and open protocols are the bedrock of the internet of value. This is why at Mysten Labs, we are creating foundational infrastructure to accelerate the adoption of decentralized protocols based on blockchain technologies. Overview Security engineers own the operational and software security of the Sui blockchain, wallet, Move language, and other Mysten systems. Security engineers support and work closely with the engineers working on the sensitive components of these systems. In addition, they are the key points of contact for audit engagements and bug bounty reports. We are hiring security engineers now as we expand the ecosystem and production services. We have a strong team in protocol security, but we need experts in operational and software security who can help us navigate the challenges of running world class infrastructure. Responsibilities - Maintain and improve the custody systems that hold validator keys, operational keys, and important objects for Mysten-run smart contracts and general on-chain operations, including key generation, storage, access controls, signing workflows, aggregation, rotation, and recovery procedures - Harden the signing path end-to-end: review and improve the code, infrastructure, and operational practices around how transactions are authorized, reviewed, and submitted on-chain - Build and improve anti-scam and anti-abuse tooling for the Sui ecosystem, detecting phishing sites, malicious dApps, drainer contracts, and other threats that target Sui users, and partnering with wallet ecosystem teams on mitigations. - Conduct code and design reviews of components that interact with sensitive keys or

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