Lead Architect – Digital Assets

About the role

Euronext is building a new Digital Assets team to develop tokenisation and distributed ledger technology (DLT) capabilities, launch products for financial institutions and retail clients, and define the next generation of financial market infrastructure. This is a founder-style mandate within an established, regulated institution, and the candidate will join the core team shaping the strategic direction. The role architects the platform behind Euronext's first tokenised offerings, spanning two live programmes: a tokenised issuance, trading and settlement platform (equities, ETFs and bonds) and a tokenised collateral-management platform for sovereign bonds.

Key responsibilities

• Own end-to-end architecture for digital asset solutions, combining DLT with trading, clearing, settlement, custody and CSD infrastructure.
• Design cross-chain topology: permissioned chains for the institutional/CCP side (Hyperledger Besu, Canton Network candidates) and public chains for DeFi distribution (Ethereum / L2).
• Define the on-chain compliance model: regulated security-token standards (ERC-3643 / T-REX), KYC-whitelisted wallets, on-chain transfer restrictions, AML screening (Chainalysis / Elliptic) and transaction reporting (MiFIR).
• Architect custody and key management around MPC solutions (Fireblocks, Taurus candidates), including a hybrid model supporting bring-your-own-custody.
• Set standards for code, review, testing and secure-by-design delivery, and lead threat modelling and security architecture until a dedicated security lead is in place.
• Plan and lead the evolution of the team as products move from build to run, and make build/buy/partner decisions on chain, custody and audit with Product.
• Collaborate with product, legal, regulatory, clearing, CSD and client working groups, and stay hands-on in incidents and on the highest-risk components.
• Define and lead an AI-augmented software-delivery process (coding assistants, smart-contract scaffolding, AI-generated test suites), set guardrails for AI-assisted code, evaluate AI tooling and specify AI-in-product capabilities with risk controls.

Required profile

• Minimum seven years of experience in solution architecture, including at least three years in DLT or blockchain projects.
• Degree in computer science, engineering or a related field; cloud or blockchain certifications are a plus.
• Proven secure-architecture and threat-modelling skills for high-value financial systems running 24x7 with zero downtime.
• Player-coach leadership, decisive and calm under pressure, with excellent communication and stakeholder-management skills.

Required skills

• Deep distributed-systems and DLT architecture experience; fluency with EVM and permissioned chains (Canton, Besu).
• Understanding of token standards for regulated securities (ERC-3643 / T-REX or equivalent), on-chain compliance and smart-contract security.
• Working knowledge of capital-market settlement (DvP, CSD, CCP/clearing) sufficient to design integrations.
• AI engineering skills required.

Applicants apply by submitting a CV in English.