Blockchain – Smart Contract Engineer – Digital Assets

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

Résumé du poste

Euronext is building a Digital Assets team in Europe and seeks a Blockchain / Smart Contract Engineer to design, build, and secure on-chain core infrastructure. You'll own smart contracts from issuance to settlement and work with product teams to deliver compliant, scalable solutions.

Key responsibilities include testing, auditing readiness, and designing tokenization engines for reuse across instrument types, with AI-assisted scaffolding guiding development.

Qualifications

• Strong experience with Solidity and EVM-based development.
• Experience with security testing, vulnerability assessment and audits.

Responsabilités

• Design, build and secure the on-chain core and smart contracts from issuance to settlement.
• Collaborate with product and cross-functional teams to deliver robust, compliant solutions.
• Prepare contracts for external audits and remediate findings.
• Develop tokenization engine design for reuse across instruments.

Connaissances

Solidity / EVM

Security-focused mindset

Auditors collaboration

Problem-solving

Communication skills

Formation

Degree in Computer Science or Engineering

Outils

Canton

Besu

Description du poste

Are you ready to shape the future of capital markets? We are building a new Digital Assets team at Euronext, with the mission to develop our tokenisation and distributed ledger technology (DLT) capabilities, launch products for financial institutions and retail clients, and define the next generation of financial market infrastructure - bridging traditional and decentralised finance. This is a founder-style mandate inside an established, regulated institution: the mission, the ambiguity and the pace of a zero-to-one build, backed by the credibility and scale of Europe's leading exchange group. By joining now, you will be part of the core team - directly involved in shaping the strategic direction and playing a decisive role in defining and building the foundations of the project.

We are looking for a Blockchain / Smart Contract Engineer. You will be responsible for designing, building and securing the on-chain core, including all smart contracts involved in our workflows from issuance to settlement. You will work closely with the product team and collaborate cross teams to deliver robust and compliant solutions. You will primarily be responsible for 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.

The position will be based in Paris, Porto, Milan or Rome, and start as soon as possible. You will report to the CTO Digital Assets.

Your profile: Strong experience with Solidity / EVM experience; 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.

Join Euronext – Shape capital markets for future generations. Join a company where market infrastructure is built on innovation — and where every innovation starts with a bold mind asking, “What’s next?”. At Euronext, we believe change is a starting point, not an obstacle. We look for people who see growth opportunities, think long term, and want to help shape capital markets for future generations. Working with us means: Being part of an international, diverse and innovative team. Developing your skills through continuous learning and real responsibilities. Contributing to projects that matter in a dynamic environment. Playing an active role in building transparent, responsible and sustainable capital markets.

Euronext Values

• Unity
• We respect and value the people we work with
• We are unified through a common purpose
• We embrace diversity and strive for inclusion
• Integrity
• We value transparency, communicate honestly and share information openly
• We act with integrity in everything we do
• We don’t hide our mistakes, and we learn from them
• Agility
• We act with a sense of urgency and decisiveness
• We are adaptable, responsive and embrace change
• We take smart risks
• Energy
• We are positively driven to make a difference and challenge the status quo
• We focus on and encourage personal leadership
• We motivate each other with our ambition
• Accountability
• We deliver maximum value to our customers and stakeholders
• We take ownership and are accountable for the outcome
• We reward and celebrate performance

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.

Additional Information

This job description is only describing the main activities within a certain role and is not exhaustive. It does not prevent to add more tasks, projects. Euronext is the leading European capital market infrastructure, covering the entire capital markets value chain, from listing, trading, clearing, settlement and custody to solutions for issuers and investors. Euronext operates MTS, one of Europe’s leading electronic fixed income trading markets, and Nord Pool, the European power market. Euronext also provides clearing and settlement services through Euronext Clearing and its Euronext Securities central securities depositories (CSDs) in Denmark, Italy, Norway and Portugal. Euronext’s regulated exchanges in Belgium, France, Greece, Ireland, Italy, the Netherlands, Norway and Portugal host a broad range of listed issuers, a strong blue-chip franchise and the largest global center for debt and fund listings. With a diverse domestic and international client base, Euronext is a major venue for European lit equity trading. Its products include equities, FX, ETFs, bonds, derivatives, commodities and indices.

Find out more about us at: Euronext.com. For more information, please visit our career website.