{"id":112342,"url":"https://alion.io/job/euronext-blockchain-smart-contract-engineer-digital-assets","title":"Blockchain – Smart Contract Engineer – Digital Assets","company":{"id":14289,"name":"Euronext","domain":"euronext.com","url":"https://alion.io/company/euronext","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":84,"open_postings":8,"ghost_share":0,"stale_share":0.625,"repost_share":0,"time_to_fill_p50_days":54,"computed_at":"2026-10-21T05:46:15Z"}},"role":"Web3","role_family":"Web3","seniority":"middle","employment_type":"contractor","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Paris, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":82000,"max_usd":178000,"period":"year","method":null,"sample_n":73},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Smart Contracts","optional":false},{"name":"Solidity","optional":false},{"name":"Token Standards","optional":false},{"name":"Tokenization","optional":false}],"status":"live","first_seen_at":"2026-07-22T00:00:00Z","employer_posted_date":"2026-07-22","last_verified_at":"2026-10-21T21:14:23Z","board_verified":true,"closed_at":null,"days_open":91,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":91},"description":"Are you ready to shape the future of capital markets?\nWe 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.\nThis 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.\nBy 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.\nWe 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.\nThe position will be based in Paris, Porto, Milan or Rome, and start as soon as possible. You will report to the CTO Digital Assets.\nYou will primarily be responsible for\nDesigning and implementing all smart contracts constituting the core of our digital assets platform.\nWriting property-based and fuzz tests; maintain invariants on supply and ownership.\nPreparing contracts for external audit and remediate findings.\nDesigning the tokenization engine for reuse across multiple instrument types.\nUsing AI-assisted contract scaffolding and refactoring, with disciplined human review of every generated line.\nGenerating property and fuzz test suites for smart-contract invariants with AI.\nUsing AI for vulnerability triage and audit preparation, treating output as leads to verify rather than conclusions.\nMaintaining prompt hygiene - never expose keys, addresses, or unaudited logic to external AI services.\nYour profile\nStrong experience with Solidity / EVM experience; permissioned-chain patterns (e.g. Canton, Besu).\nDeep understanding of ERC-20 and extensions.\nExperience with property-based and fuzz testing; gas and security profiling.\nA precise, security-first mindset and experience working with auditors.\nExcellent analytical, problem-solving and communication skills.\nDegree in computer science, engineering or a related field, with three or more years of relevant experience.\nJoin Euronext - Shape capital markets for future generations\nJoin 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.\nWorking with us means:\nBeing part of an international, diverse and innovative team.\nDeveloping your skills through continuous learning and real responsibilities.\nContributing to projects that matter in a dynamic environment.\nPlaying an active role in building transparent, responsible and sustainable capital markets.\nApply by submitting a CV in English.\nThe CEDS Digital Asset team is dedicated to advancing secure and resilient securities issuance and settlement. We deliver cutting-edge solutions for both domestic and international markets, supporting clients throughout the entire value chain. Join us and play a key role in building the next generation of digital asset infrastructure.\nEuronext is the leading European capital market covering the entire capital markets value chain, from listing, trading, clearing, settlement and custody, to solutions for issuers and investors. We operate seven national stock exchanges, handling 25% of European lit equity trading. Our products include equities, FX, ETFs, bonds, derivatives, commodities and indices. Euronext also provides clearing and settlement services through Euronext Clearing and our network of Euronext Securities CSDs. In addition, Euronext runs MTS, one of Europe’s leading electronic fixed income trading markets, and Nord Pool, the European power market. The company has a diverse domestic and international client base.\nFind out more about us at: Euronext.com\nEuronext Values\nUnity\nWe respect and value the people we work with\nWe are unified through a common purpose\nWe embrace diversity and strive for inclusion\nIntegrity\nWe value transparency, communicate honestly and share information openly\nWe act with integrity in everything we do\nWe don’t hide our mistakes, and we learn from them\nAgility\nWe act with a sense of urgency and decisiveness\nWe are adaptable, responsive and embrace change\nWe take smart risks\nEnergy\nWe are positively driven to make a difference and challenge the status quo\nWe focus on and encourage personal leadership\nWe motivate each other with our ambition\nAccountability\nWe deliver maximum value to our customers and stakeholders\nWe take ownership and are accountable for the outcome\nWe reward and celebrate performance\nWe 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.\nAdditional Information\nThis 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.","description_format":"text","description_chars":5770,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Continuous learning","Equity","Growth opportunities"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Smart Contracts & Security","Cryptocurrencies","Stock Exchanges & Market Infrastructure"],"lifecycle":[{"event":"open","at":"2026-07-22T00:00:00Z"}],"visa":[],"liveness":{"score":24,"band":"cold","label":"Long shot","p_open":1,"p_active":0.669,"p_room":0.36,"age_days":91,"expected_fill_days":54,"reasons":["conf:0","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-21T05:46:15Z"},"pay":null,"html_url":"https://alion.io/job/euronext-blockchain-smart-contract-engineer-digital-assets","json_url":"https://alion.io/job/euronext-blockchain-smart-contract-engineer-digital-assets.json","meta":{"generated_at":"2026-10-21T23:43:02Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":33828,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-22T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":14289},"rest":"https://alion.io/mcp/rest/get_company?id=14289"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Feuronext-blockchain-smart-contract-engineer-digital-assets"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Feuronext-blockchain-smart-contract-engineer-digital-assets"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Feuronext-blockchain-smart-contract-engineer-digital-assets"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/euronext-blockchain-smart-contract-engineer-digital-assets\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Feuronext-blockchain-smart-contract-engineer-digital-assets"}]}