Blockchain – Smart Contract Engineer – Digital Assets

Job Overview

Blockchain / Smart Contract Engineer at Euronext’s Digital Assets team. Position based in Paris, Porto, Milan, or Rome; start as soon as possible. Reports to the CTO Digital Assets.

Responsibilities

• Design, build, and secure the on‑chain core, including all smart contracts involved in issuance to settlement.
• Write property‑based and fuzz tests; 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 while conducting disciplined human review of every generated line.
• Generate property and fuzz test suites for smart‑contract invariants with AI.
• Use AI for vulnerability triage and audit preparation, treating output as leads to verify rather than conclusions.
• Maintain prompt hygiene – never expose keys, addresses, or unaudited logic to external AI services.

Qualifications

• Strong experience with Solidity / EVM and permissioned‑chain patterns (e.g., Canton, Besu).
• Deep understanding of ERC‑20 and extensions.
• Experience with property‑based and fuzz testing, gas and security profiling.
• Security‑first mindset and experience working with auditors.
• Excellent analytical, problem‑solving, and communication skills.
• Degree in computer science, engineering or a related field, with three or more years of relevant experience .

Benefits

• Part of an international, diverse and innovative team.
• Continuous learning and real responsibilities.
• Contribute to projects that matter in a dynamic environment.
• Active role in building transparent, responsible and sustainable capital markets.

EEO Statement

We are proud to be an equal opportunity employer. We do not discriminate against individuals on the basis of race, gender, age, citizenship, religion, sexual orientation, gender identity or expression, disability, or any other legally protected factor. We value the unique talents of all our people, who come from diverse backgrounds with different personal experiences and points of view and we are committed to providing an environment of mutual respect.