{"id":4035012,"url":"https://alion.io/job/euronext-principal-software-engineer-csd-integration-asset-servicing","title":"Principal Software Engineer – CSD Integration & Asset Servicing","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":"A","score":86,"open_postings":8,"ghost_share":0,"stale_share":0.375,"repost_share":0,"time_to_fill_p50_days":62,"computed_at":"2026-11-10T06:52:35Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","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":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ActiveMQ","optional":false},{"name":"Apache Kafka","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"Go","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"LLM Guardrails","optional":false},{"name":"OpenShift","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"Terraform","optional":false},{"name":"AWS","optional":true}],"status":"live","first_seen_at":"2026-11-10T19:52:53Z","employer_posted_date":"2026-11-10","last_verified_at":"2026-11-11T01:42:06Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"About the role\nEuronext is building digital-asset services on its existing securities-market infrastructure. We are looking for a Principal Software Engineer to design and build the CSD capabilities that connect the two.\nYou will lead the architecture of the CSD Integration, Asset Servicing & Reporting team. The team builds the gateway and services that connect digital-asset applications to Euronext Securities for securities lock and release, settlement status, corporate actions and reporting. We reuse existing CSD capabilities; we do not rebuild the CSD.\nYou are both architect and developer: you design the solution, write production code in the team’s codebase and review your colleagues’ code. This is not a product-owner or functional-analyst role.\nAbout the mission\nThe team owns the CSD side of Euronext Digital Assets: the CSD gateway for lock and release, T2S instructions and confirmations, corporate actions, T2 and Pontes, and reporting to custodians.\nYou will take these services from the first issuance and settlement flows to a scalable asset-servicing platform. You will agree the CSD gateway interface with the tokenisation-engine team and work with the principal architect, who owns the end-to-end design across teams.\nWhat you’ll do\nOwn the team’s technical architecture: designs, interface contracts, standards and roadmap.\nContribute production code to the codebase, starting with the most critical components such as the CSD gateway.\nReview code: pull requests, coding standards, test coverage and security of the codebase.\nDesign the CSD gateway and its T2S integration: lock and release, instructions, queuing, cut-offs, confirmations and status.\nDesign for failure, not only the normal flow: duplicate or delayed messages, retries, partial failures, corrections, reconciliation breaks and auditable exception handling.\nReuse and extend existing Euronext Securities systems rather than duplicate them.\nShape the architecture for corporate actions, entitlements and reporting to custodians.\nSet and test non-functional requirements: resilience, performance, security, recoverability and observability.\nBuild prototypes and lead build, buy and integration decisions.\nWork with the product manager, who owns priorities and requirements; you own the technical solution.\nHelp the team build, test and run what it ships: environments, CI/CD, monitoring, runbooks and support during T2S operating hours.\nWhat you bring\nRequired: post-trade and system knowledge\nStrong knowledge of securities post-trade: settlement, custody, corporate actions and CSD operations.\nT2S experience: settlement instructions, lifecycle, cut-offs and status reporting.\nISO 20022 settlement messaging and SWIFT connectivity.\nRequired: architecture and design\nSolution architecture for regulated, high-availability systems: security, resilience and auditability.\nEvent-driven architecture and domain-driven design.\nIntegration with legacy financial-market platforms, modernised step by step without disrupting live operations.\nRequired: technical implementation\nBackend development in Go and/or Java: production code, not only prototypes.\nREST APIs (OpenAPI), Kafka and message brokers such as ActiveMQ.\nSQL and NoSQL data stores.\nContainers on Linux: Docker, Kubernetes or OpenShift.\nGit, CI/CD, test automation, infrastructure as code (e.g. Terraform) and observability (e.g. OpenTelemetry).\nAI-assisted development: daily use of coding assistants, with review guardrails for AI-generated code.\nRequired: experience and leadership\n8+ years of software engineering on production systems, including 3+ years as lead engineer, software architect or solution architect, while still writing and reviewing code.\nTechnical leadership: set standards, explain trade-offs to technical and non-technical audiences, coach engineers.\nDegree in computer science, engineering or a related field, or equivalent experience.\nFluent in English.\nNice to have\nT2 and Pontes.\nCross-CSD links.\nCorporate-actions platforms.\nPublic cloud (AWS).\nDLT and blockchain: a plus, not a requirement.\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. 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