Blockchain Smart Contract Engineer (Web3)

TL;DR

Blockchain Smart Contract Engineer (Web3): Designing and building the on-chain core for a new digital assets platform with an accent on smart contract security, tokenization engines, and DLT integration. Focus on implementing robust, audit-ready smart contracts and leveraging AI-assisted tools for vulnerability triage and testing within a regulated financial environment.

Location: Must be based in or able to work from Paris, Porto, Milan, or Rome

Company

hirify.global is the leading European capital market operator, managing seven national stock exchanges and providing comprehensive financial infrastructure services across the entire value chain.

What you will do

• Design and implement core smart contracts for the digital assets platform.
• Develop property-based and fuzz test suites to maintain supply and ownership invariants.
• Prepare contracts for external audits and remediate identified findings.
• Architect a reusable tokenization engine for various financial instrument types.
• Utilize AI-assisted scaffolding and refactoring tools with disciplined human review.
• Perform vulnerability triage and audit preparation using AI-driven insights.

Requirements

• Strong experience with Solidity and EVM-based development.
• Deep understanding of ERC-20 standards and permissioned-chain patterns like Canton or Besu.
• Minimum of three years of relevant professional experience.
• Proven experience with property-based and fuzz testing, including gas and security profiling.
• Security-first mindset with experience collaborating with external auditors.
• Degree in computer science, engineering, or a related field.

Culture & Benefits

• Opportunity to work on a zero-to-one build within a major regulated financial institution.
• Exposure to international, diverse, and innovative teams.
• Continuous learning and professional development opportunities.
• Contribution to building transparent and sustainable capital market infrastructure.