Blockchain Smart Contracts Engineer – Digital Assets

Euronext; Paris; Sur place; EUR 90 000 - 130 000; Plein temps

Résumé du poste

Euronext is building a new Digital Assets team in Paris, Porto, Milan or Rome. We seek a Blockchain / Smart Contract Engineer to design, build and secure the on-chain core, including all smart contracts in our issuance to settlement lifecycle.

You will collaborate with product teams to deliver robust, compliant solutions, reporting to the CTO Digital Assets. The role involves tokenization engine design, AI-assisted scaffolding with rigorous human review, and close work with auditors to ensure

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.
• A precise, 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.

Responsabilités

• Designing and implementing all smart contracts constituting the core of our digital assets platform.
• Writing property-based and fuzz tests; maintain invariants on supply and ownership.
• Preparing contracts for external audit and remediate findings.
• Designing the tokenization engine for reuse across multiple instrument types.
• Using AI-assisted contract scaffolding and refactoring, with disciplined human review of every generated line.
• Generating property and fuzz test suites for smart-contract invariants with AI.
• Using AI for vulnerability triage and audit preparation, treating output as leads to verify rather than conclusions.
• Maintaining prompt hygiene - never expose keys, addresses, or unaudited logic to external AI services.

Connaissances

Solidity & EVM

Permissioned chains

ERC-20

Property-based testing

Fuzz testing

Security profiling

Auditing collaboration

Analytical skills

Formation

Degree in computer science/engineering

Description du poste

Euronext is building a new Digital Assets team in Paris, Porto, Milan or Rome. We seek a Blockchain / Smart Contract Engineer to design, build and secure the on-chain core, including all smart contracts in our issuance to settlement lifecycle.

You will collaborate with product teams to deliver robust, compliant solutions, reporting to the CTO Digital Assets. The role involves tokenization engine design, AI-assisted scaffolding with rigorous human review, and close work with auditors to ensure