{"id":3411434,"url":"https://alion.io/job/visian-senior-net-engineer","title":"Senior .NET Engineer","company":{"id":3908419,"name":"Visian","domain":"visian.tech","url":"https://alion.io/company/visian","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Welcome to the Jungle","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"freelance","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":44000,"max_usd":74000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":182},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Azure","optional":false},{"name":"Azure DevOps","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Clean Architecture","optional":false},{"name":"Kubernetes","optional":false},{"name":"PostgreSQL","optional":false}],"status":"live","first_seen_at":"2026-10-28T14:05:50Z","employer_posted_date":null,"last_verified_at":"2026-10-28T14:05:50Z","board_verified":false,"closed_at":null,"days_open":2,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":2},"description":"Objectif : renforcer l’équipe avec un contractor senior capable de livrer des features complexes en autonomie, dans une logique « you build it, you run it ».\nParties prenantes : Core Engineering Manager / Staff Engineer, Product Managers, UX/UI designers, équipes d’ingénierie des tribus Client, Merchant et User.\n\nHands-on engineering\nConcevoir, développer, tester et maintenir les microservices .NET et les packages NuGet SDK partagés, consommés par toutes les tribus.\nContribuer à la conception technique des nouvelles features et des refactorings. Proposer et défendre des découpages de domaines en design reviews.\nAppliquer et étendre les patterns d’architecture de l’équipe : Clean Architecture, DDD, CQRS/MediatR, patterns event-driven, Outbox pattern.\nTraiter les enjeux de performance, de scalabilité et de sécurité d’une plateforme multi-tenant.\nQualité technique et pratiques d’ingénierie\nContribuer à la qualité du code, à la performance, à la sécurité et à l’observabilité des services de l’équipe.\nPrendre sa part du run : santé des services, gestion des incidents, postmortems blameless.\nSuivre et améliorer les pratiques d’ingénierie : CI/CD sur Azure DevOps, tests automatisés, code reviews, ADRs, documentation, pair programming.\nCollaboration transverse\nTravailler avec l’Engineering Manager ou le Staff Engineer sur la planification, la gestion des risques et les arbitrages de delivery.\nTravailler avec les Product Managers et les UX/UI designers pour construire des solutions réalistes et à forte valeur.\nReprésenter le point de vue technique de l’équipe dans les discussions au niveau tribu et plateforme.\nLivrables attendus\nCode de production (microservices, packages NuGet SDK) livré via des pull requests relues, avec tests automatisés.\nDocumentation technique et ADRs pour les décisions de design prises.\nContribution au run des services de l’équipe (gestion d’incidents, postmortems).\n\nProfil recherché\nExpérience\n5+ ans d’expérience professionnelle en ingénierie logicielle.\nExposition réelle à la production sous charge : a opéré des services dont il a assuré le run (santé des services, incidents, scaling, contention, coûts d’infrastructure).\nCapacité prouvée à livrer des features complexes en autonomie et à accompagner la montée en compétences d’ingénieurs plus juniors.\nCompétences techniques\nForte expertise .NET / C# et systèmes distribués sur Azure.\nBonne compréhension de Clean Architecture, DDD, CQRS / MediatR, microservices, MongoDB, PostgreSQL, Kubernetes, CI/CD sur Azure DevOps.\nPratiques modernes : tests automatisés, observabilité, performance tuning, postmortems, ADRs.\nPratique avancée du développement assisté par IA, au-delà du simple prompting : IA sur tout le cycle d’ingénierie (design, implémentation, tests, review, debugging), délégation de tâches bien cadrées à des coding agents, vérification systématique de tout ce que l’IA génère.\nExpérience concrète d’OAuth2 / OIDC, de la gestion d’identité et de l’autorisation sur une plateforme multi-tenant (tokens, scopes/claims, rôles et permissions, isolation des tenants).\nExpérience concrète du traitement asynchrone :\nmessaging : idempotence, retries, dead-letter queues, eventual consistency, Outbox pattern ;\njobs planifiés / batchs : scheduling, reprise sur erreur et redémarrage, monitoring.\nCapacité à investiguer un incident de bout en bout sur toute la stack : logs, traces et métriques, monitors/alertes, requêtes MongoDB et PostgreSQL, comportement des pods Kubernetes.\nSoft skills et langues\nExcellente communication, y compris pour expliquer des sujets techniques à des interlocuteurs non techniques.\nEsprit d’équipe, rigueur, autonomie, pragmatisme dans la prise de décision.\nAnglais et français courants (obligatoire).","description_format":"text","description_chars":3739,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["AI Consulting & Integration","Analytics & BI Consulting"],"lifecycle":[{"event":"open","at":"2026-10-28T17:56:15Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring 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Docs: https://alion.io/developers"}}