Lead Blockchain Security Developer (Canton) - OpenZeppelin

About Us

OpenZeppelin is the security standard onchain finance is built on. Founded in 2015, our mission is to accelerate the world's transition to an open financial system, built on open standards and secured by rigorous research. Our open-source Contract Libraries have facilitated over $35 trillion in onchain value and are used by top financial institutions and crypto-native teams worldwide.

The Canton Network Engagement

This role joins us at the start of a groundbreaking 24-month, multi-million-dollar commitment to build the open-source DeFi foundations of the world's most institutional blockchain. You'll deliver production-ready Reference Implementations (privacy-preserving DEX, lending, cross-chain stablecoin settlement, confidential auction launchpad), the OpenZeppelin Contracts Library for Daml, and Canton standards implementation.

Within this, you will:

• Own the development of the OpenZeppelin Contracts Library for Daml end-to-end: vaults, hooks, RBAC, credentials, messaging gateway, accounts, and more.
• Lead the technical design and implementation of the year-1 Reference Implementations: privacy-preserving DEX, lending protocol, cross-chain stablecoin settlement, and confidential auction launchpad.
• 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 with Digital Asset, the Canton Foundation, and ChainSafe.
• Collaborate with OpenZeppelin's auditors and security researchers on threat models, audit prep, and full-stack reviews.
• Use AI systems as core daily tools, building agents, skills, and workflows that compound the team's leverage.
• Contribute developer-experience and security feedback upstream into the Canton protocol, Splice, the Daml SDK, and the Splice Wallet Kernel.
• Conduct open-ended research around privacy-preserving DeFi and multi-party authorization patterns.

You have:

• Production Daml fluency: Experience with templates, choices, signatories, multi-party authorization, sub-transaction views, and propose/accept patterns.
• 3+ years of experience in UTXO-based protocol development (Canton, Cardano, Midnight, Zcash, Aleo, Mina, or similar).
• 3+ years of experience on DeFi engineering in production (AMMs, vaults, lending protocols, cross-chain settlement).
• A security-first mindset: Demonstrable experience auditing, breaking, or hardening production systems.
• Library / SDK API design taste: Built reusable, import-first developer libraries with clear extension patterns.
• Cross-chain interoperability exposure with major cross-chain messaging protocols.
• Institutional / compliance design fluency: Experience with credential gates, multi-party attestation, and custody flows.
• An AI-native workflow: Proficiency with Claude Code, Cursor, or equivalent tools, with measurable productivity gains.

Logistics & Benefits

• Fully remote work flexibility across UTC-8 to UTC+3 time zones
• Flexible time off (PTO)
• Paid parental leave and baby bonus
• Equipment support for home office
• Medical insurance
• Learning and development stipend
• Monthly co-working space stipend
• Global company gatherings