Blockchain / Smart Contract Engineer – 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 inside an established, regulated institution, with the candidate reporting to the CTO Digital Assets. The position is based in Paris, Porto, Milan or Rome and can start as soon as possible.

Key responsibilities

• Design and implement all smart contracts forming the core of the digital assets platform, from issuance to settlement.
• Write property-based and fuzz tests and maintain invariants on supply and ownership.
• Prepare contracts for external audit and remediate findings.
• Design the tokenization engine for reuse across multiple instrument types.
• Use AI-assisted contract scaffolding and refactoring, with disciplined human review of every generated line, and generate test suites with AI.
• Use AI for vulnerability triage and audit preparation, verifying its output rather than accepting it as conclusions.
• Maintain prompt hygiene: never expose keys, addresses or unaudited logic to external AI services.

Required profile

• Degree in computer science, engineering or a related field, with three or more years of relevant experience.
• Security-first mindset and experience working with auditors.
• Excellent analytical, problem-solving and communication skills.

Required skills

• Strong Solidity / EVM experience; permissioned-chain patterns such as Canton and Besu.
• Deep understanding of ERC-20 and its extensions.
• Experience with property-based and fuzz testing, and gas and security profiling.

To apply, submit a CV in English.