Senior Blockchain Security Developer; Canton

About us

Open Zeppelin 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 10 of the top 10 tokenized money market funds and 9 of the top 10 stable coins by market cap.

We combine AI‑native security tooling with deep research and a decade of audit expertise to support leading institutions and crypto‑native teams shaping the next generation of digital assets like DTCC, Fidelity, Coinbase, Uniswap, Aave, the Ethereum Foundation, and many more across the full secure development lifecycle.

Please note:

Always refer to Open Zeppelin's official job page for the most accurate information about our open roles, as we have seen multiple third‑party job sites posting inaccurate information.

Open Zeppelin is the security partner of choice for the most important protocols in Web
3. Our Secure Development team sits at the intersection of building and breaking: we design, implement, and harden production‑grade libraries and smart contracts for leading projects across EVM, Starknet, Stellar/Soroban, Arbitrum Stylus, Aptos, and beyond, often as an embedded extension of the client's engineering team.

We work the way the rest of the industry will five years from now. Every developer on the team is a fully AI‑native engineer, supported by outstanding internal AI tooling built for every phase of secure development. Developers own their work streams end‑to‑end – agents amplify their effectiveness, and peers, security researchers, and external auditors provide rigorous review on every piece of work that ships.

This role joins us at the start of a 24‑month, multi‑million‑dollar commitment to build the open‑source DeFi foundations of the world's most institutional blockchain, approved by the Canton Foundation. The scope:

• 8 production‑ready Reference Implementations
  . Privacy‑preserving DEX, lending protocol, cross‑chain stablecoin settlement, confidential auction launchpad, and four more defined in year two. End‑to‑end blueprints that other teams will fork.
• The Open Zeppelin Contracts Library for Daml
  . The audited foundation Canton developers will import – vaults, hooks, RBAC, credentials, modular multi‑sig accounts, standardized messaging gateway, DeFi math, staking, vesting, auctions, more. The same role our Solidity library plays today, on Canton.
• Canton standards implementation
  . Audited Daml implementations of CIP‑56 (Token Standard), CIP‑86 (ERC‑20 Compatible Interface), CIP‑103 (dApp Standard), and CIP‑104 (Traffic‑Based App Rewards) – designed to interoperate cleanly with the broader Splice ecosystem and with Chain Safe's CIP‑86 middleware.
• 55 researcher‑weeks of dedicated security capacity
  . Smart‑contract audits, full‑stack reviews, pen tests – amplified by Open Zeppelin's AI security agent in the workflow. Every release ships with a published audit report.
• AI‑native developer experience for a new ecosystem
  . Contracts Wizard, UI Builder, MCP Server, Claude Plugin, AI Skills – all built for Canton, all AI‑native end‑to‑end. You'll help define how AI‑native engineering looks on a non‑EVM stack.

You’ll work alongside Digital Asset, the Canton Foundation, and Chain Safe. The deliverables become the standard others build on. The work is public; the impact is measurable; the partners are the institutions reshaping how capital moves. Canton is your first focus, but you'll keep contributing across the broader Secure Development portfolio as the work demands.

• Own the development of the Open Zeppelin Contracts Library for Daml end‑to‑end: vaults, hooks, RBAC, credentials, messaging gateway, accounts, and more. The audited primitives Canton developers will import.
• 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…