Senior Blockchain Security Developer

🕒 May 21

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OpenZeppelin

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2015

🔐 Security

☁️ SaaS

💰 Seed Round on 2018-01

Security • Blockchain • SaaS

OpenZeppelin is a leading provider of open-source tools and services that secure and streamline smart contract development. They offer a comprehensive suite of solutions, including a secure smart contract library, an interactive smart contract generator (Contracts Wizard), and a defender cloud service for monitoring, automating, and upgrading smart contracts. OpenZeppelin's services include smart contract security audits and emergency response teams to address vulnerabilities promptly. Their ecosystem stack accelerates developer onboarding and ensures high security standards are met in decentralized applications. Trusted by major decentralized projects, OpenZeppelin is a standard-bearer in the blockchain space, focusing on security, scalability, and privacy in smart contract and onchain applications development.

📋 Description

• Own the development of the OpenZeppelin Contracts Library for Daml end-to-end. • Lead the technical design and implementation of the year-1 Reference Implementations. • Implement and shepherd the OZ Daml versions of CIP-56, CIP-86, CIP-103, and CIP-104. • Run client-facing roadmap, design, and milestone discussions. • Collaborate with OpenZeppelin's auditors and security researchers on threat models. • Use AI systems as core daily tools. • Apply AI directly to security work and share what works back to the team. • Contribute developer-experience and security feedback upstream into the Canton protocol. • Conduct open-ended research around privacy-preserving DeFi.

🎯 Requirements

• Production Daml fluency. You have shipped non-trivial Daml in production. • 3+ years of experience in UTXO-based protocol development. • 3+ years of experience on DeFi engineering in production. • A security-first mindset. This is non-negotiable. • Library / SDK API design taste. You've built reusable developer libraries. • Cross-chain interoperability exposure. Production work with at least one major cross-chain messaging protocol. • Institutional / compliance design fluency: You can design with credential gates, multi-party attestation, custody flows, and compliance hooks as native constraints. • An AI-native workflow. Claude Code, Cursor, or equivalent is your daily driver. • Experience applying AI to security work: You've already used AI in security workflows. • Fluency in client-facing communication (English). • Autonomy and proactivity.

🏖️ Benefits

• Company in-person gatherings in different locations around the world 😎 • Fully remote work 🌎 • Flexible time off 🏝 • Paid parental leave 💙 • One time work-from-home equipment stipend of up to $500 USD 🪑 • Medical insurance coverage 🏥 • Learning & Development opportunities 🧠 • Work with a global team in a fast-growing industry 🚀