{"id":2635074,"url":"https://alion.io/job/nexton-developpeur-senior-javascript-backend-hf","title":"Développeur Senior JavaScript / Backend H/F","company":{"id":7029,"name":"Nexton","domain":"nexton-consulting.com","url":"https://alion.io/company/nexton","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","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":{"min_usd":50000,"max_usd":85000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":163},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Akamai","optional":false},{"name":"CI/CD","optional":false},{"name":"Clean Architecture","optional":false},{"name":"Cloudflare","optional":false},{"name":"Docker","optional":false},{"name":"ElasticSearch","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"Jest","optional":false},{"name":"Kubernetes","optional":false},{"name":"Memcached","optional":false},{"name":"Nest.JS","optional":false},{"name":"Node JS","optional":false},{"name":"RabbitMQ","optional":false},{"name":"Redis","optional":false},{"name":"Vitest","optional":false}],"status":"live","first_seen_at":"2026-10-15T14:13:29Z","employer_posted_date":"2026-10-15","last_verified_at":"2026-10-17T08:47:27Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Qui sommes-nous ?\nRejoindre NEXTON, c'est intégrer une entreprise où convergent l'esprit d'un cabinet de conseil, la créativité d'une Factory et la dynamique d'une ESN ! Grâce à notre expertise, nous accompagnons des clients grands comptes et des pure players tels que SNCF, Orange, et BNP Paribas dans leurs stratégies d'évolution et d'innovation digitale.\nFondée en 2011, NEXTON réunit aujourd'hui une équipe de plus de 450 experts spécialisés dans le digital, le design, l'agilité, le produit et le développement. Ensemble, ils créent un écosystème riche en connaissances et en compétences diversifiées.\n NEXTON recrute unDéveloppeur Senior JavaScript / Backend H/F en CDI, à Paris !\nTon futur environnement de travail :\nTu intègres l'équipe pour l'un de nos grands comptes afin de participer à la conception, au développement et à l'optimisation d'applications web backend à forte audience.\nTes missions :\nConception et Développement : Analyser les besoins métier, concevoir et développer de nouvelles fonctionnalités robustes en Node.js, NestJS et Express.\n\nQualité et Refactoring : Améliorer en continu la qualité, la lisibilité et les performances du code existant, et appliquer les bonnes pratiques de développement.\n\nArchitecture et Performance : Mettre en œuvre des architectures applicatives (SOLID, Clean/Hexagonale, microservices), gérer le traitement asynchrone (RabbitMQ) et optimiser la gestion du cache (Varnish, Redis, Memcached).\n\nTests et Qualité logicielle : Rédiger et exécuter les tests unitaires et d'intégration (Jest, Vitest) dans une démarche TDD et un contexte CI/CD.\n\nCollaboration et Agilité : Participer aux revues de code, rédiger la documentation technique, partager tes connaissances et être un acteur clé des cérémonies Agile.\n\nQualifications :\nDe formation supérieure, tu justifies d'au moins 5 ans d'expérience significative en développement backend JavaScript / Node.js.\n\nTu maîtrises parfaitement NodeJS (24), NestJS, Express, ainsi que les systèmes de messagerie (RabbitMQ) et les stratégies de cache applicatif et reverse proxy (Varnish, Redis).\n\nTu as une solide connaissance des principes d'architecture logicielle (SOLID, Clean Architecture, microservices, design patterns).\n\nTu pratiques couramment les tests automatisés (TDD, Jest/Vitest) et tu maîtrises les environnements conteneurisés (Docker) ainsi que Git.\n\nDes compétences sur Kubernetes, Elasticsearch, CDN (Akamai, Cloudflare, CloudFront) ou une expérience dans le secteur des médias/éditorial sont un vrai plus.\n\n Pourquoi choisir NEXTON ?\nNous te proposons des avantages et des opportunités pour enrichir ton expérience professionnelle et personnelle tout au long de l'année :\nDes communautés dynamiques pour t'accompagner dans ton parcours.\nDes Meet Up pour développer tes compétences.\nDes formations pour te réinventer et progresser.\nDes événements sportifs et festifs pour t'épanouir.\nUn forfait mobilité durable pour faciliter ton quotidien et encourager la mobilité douce.\nUn téléphone de dernière génération pour rester connecté.\nPrêt à nous rejoindre ? Rencontrons-nous !\nNEXTON","description_format":"text","description_chars":3091,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"French","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["AI Consulting & Integration","Analytics & BI Consulting","Data Engineering & Migration Services"],"lifecycle":[{"event":"open","at":"2026-10-15T17:16:31Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":1,"expected_fill_days":30,"reasons":["conf:0","velocity","win:early","comp:brand"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/nexton-developpeur-senior-javascript-backend-hf","json_url":"https://alion.io/job/nexton-developpeur-senior-javascript-backend-hf.json","meta":{"generated_at":"2026-10-17T09:18:21Z","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":12246,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":7029},"rest":"https://alion.io/mcp/rest/get_company?id=7029"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fnexton-developpeur-senior-javascript-backend-hf"},{"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%2Fnexton-developpeur-senior-javascript-backend-hf"},{"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%2Fnexton-developpeur-senior-javascript-backend-hf"},{"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/nexton-developpeur-senior-javascript-backend-hf\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fnexton-developpeur-senior-javascript-backend-hf"}]}