{"id":4184702,"url":"https://alion.io/job/dekimo-experts-senior-backend-developer-c-net-trading-systems","title":"Senior Backend Developer C#/.NET – Trading Systems","company":{"id":3910104,"name":"Dekimo Experts","domain":"dekimo.com","url":"https://alion.io/company/dekimo-experts","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"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":["La Defense, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"C#","optional":false},{"name":"OpenTelemetry","optional":false}],"status":"live","first_seen_at":"2026-11-12T15:01:10Z","employer_posted_date":null,"last_verified_at":"2026-11-12T15:01:10Z","board_verified":false,"closed_at":null,"days_open":1,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":1},"description":"Senior Backend Developer C#/.NET – Trading Systems\n📍 Localisation : La Défense\n 🏠 Télétravail : 3 jours par semaine\n 📅 Démarrage : novembre \n 📄 Durée : mission longue\n\n🔎 Contexte\nDans un environnement de trading soumis à de fortes contraintes de performance, nous recherchons un Senior Backend Developer C#/.NET pour participer à la refonte d’un serveur critique.\n\n🎯 Vos missions\nConcevoir et développer des composants backend à très faible latence.\nProduire un code hautement optimisé, limitant les allocations mémoire et l’impact du Garbage Collector.\nParticiper à la refonte et à la migration du serveur de trading vers .NET 10.\nAuditer et optimiser le SDK client distribué via NuGet.\nAméliorer les performances, la consommation mémoire et les pratiques d’intégration.\nGarantir la stabilité, la fiabilité et la prédictibilité du système en production.\nContribuer à l’évolution de l’observabilité de la plateforme.\n\n⚙️ Environnement technique\nC# / .NET 10\nArchitecture backend pure : DLL / SDK / NuGet\nDéveloppement haute performance et faible latence\nOptimisation mémoire et Garbage Collector\nSplunk\nMigration vers OpenTelemetry : métriques, traces et observabilité avancée.\n\nProfil recherché\n🎯 Vos missions\nConcevoir et développer des composants backend à très faible latence.\nProduire un code hautement optimisé, limitant les allocations mémoire et l’impact du Garbage Collector.\nParticiper à la refonte et à la migration du serveur de trading vers .NET 10.\nAuditer et optimiser le SDK client distribué via NuGet.\nAméliorer les performances, la consommation mémoire et les pratiques d’intégration.\nGarantir la stabilité, la fiabilité et la prédictibilité du système en production.\nContribuer à l’évolution de l’observabilité de la plateforme.","description_format":"text","description_chars":1747,"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":["PCB Fabrication & Assembly"],"lifecycle":[{"event":"open","at":"2026-11-12T17:57:36Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring 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