Blockchain security developer Canton

Open Zeppelin provides security services and open-source contract libraries for onchain finance and Web
3. Its work combines AI-native security tooling, research, and audit expertise to support institutions and crypto-native teams throughout the secure development lifecycle.

• Own features of the Open Zeppelin Contracts Library for Daml end to end, from design through audit
• Design and implement components of the year-one Reference Implementations, including a 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 future CIPs
• Coordinate with Digital Asset on specification evolution and with Chain Safe on middleware alignment
• Present and defend designs in technical discussions with Digital Asset, the Canton Foundation, and other partners
• Work with security researchers on threat models, audit preparation, and fixes for owned components
• Use AI systems for research, design, implementation, testing, and security work; build agents, skills, and workflows, and share effective approaches with the team
• Contribute developer-experience and security feedback upstream to the Canton protocol, Splice, the Daml SDK, and the Splice Wallet Kernel
• Research privacy-preserving DeFi, multi-party authorization patterns, and Canton-specific primitives, and share findings with the team

• Production fluency in Daml, including templates, choices, controllers, observers, signatories, multi-party authorization, sub-transaction views, and propose/accept patterns
• Deep understanding of Canton architecture, including the Global Synchronizer, private synchronize rs, transaction visibility, smart contract upgrades, and token standards
• At least 3 years of production smart contract development, including hands-on work on Canton or another UTXO-based or privacy-preserving architecture
• Production DeFi experience shipping primitives such as AMMs, vaults, lending protocols, or cross-chain settlement
• Understanding of security pitfalls and standard EVM patterns, including access control, token standards, lending pools, and DEXs
• A security-first mindset, adversarial thinking, and the ability to identify vulnerabilities in Daml code
• Daily use of Claude Code, Cursor, or equivalent; familiarity with agents, harnesses, and skills, and accountability for shipped AI-assisted work
• Fluent English for client-facing communication
• Autonomy and proactivity
• Будет плюсом: published audits, threat models or disclosures, cryptography or financial engineering background, privacy-preserving DeFi, institutional finance and compliance design, experience running an SV or contributing to Splice internals, governance or Canton Coin tokenomics, cross-chain messaging protocols, reusable library or SDK API design, applying AI to security work, hands-on experience with non-EVM ecosystems, open-source contributions to widely used smart-contract or AI-tooling libraries

• Fully remote work
• Flexible time off
• 8 Weeks of paid leave for primary caregivers and 4 weeks for secondary caregivers
• One-time $3,600 baby bonus
• Up to $500 in home-office equipment support
• Medical insurance
• Learning and development opportunities
• Monthly stipend for a preferred co-working space
• Paid technical work trial as part of the interview process