{"id":3356213,"url":"https://alion.io/job/nexin-senior-java-developer-freelance","title":"Senior Java Developer Freelance","company":{"id":4412981,"name":"Nexin","domain":"nexin.be","url":"https://alion.io/company/nexin-2","size_band":"1001-5000","is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"Schema","truth_index":{"grade":"B","score":75,"open_postings":14,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-31T05:58:55Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"freelance","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Gembloux, Belgium"],"countries":["BE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Angular","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"Gradle","optional":false},{"name":"Hibernate","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"Maven","optional":false},{"name":"Rest API","optional":false},{"name":"SOAP","optional":false},{"name":"Spring Boot","optional":false},{"name":"Spring Framework","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-06-22T00:00:00Z","employer_posted_date":"2026-06-22","last_verified_at":"2026-10-31T07:45:13Z","board_verified":true,"closed_at":null,"days_open":132,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":131},"description":"Développeur Java Senior Freelance\nContexte de la Mission\nDans le cadre du renforcement de équipes projets de notre client, nous recherchons un(e) Développeur(se) Java Senior Freelance pour intervenir sur des projets stratégiques à forte valeur ajoutée.\nEn collaboration avec les équipes métier, les architectes et les autres développeurs, vous participez à l'ensemble du cycle de développement, depuis l'analyse des besoins jusqu'à la mise en production des solutions.\nVous apportez votre expertise technique, conseillez les parties prenantes sur les choix technologiques et contribuez activement à la réussite des projets tout en garantissant un haut niveau de qualité.\nMissions\nAnalyser les besoins fonctionnels et techniques.\nConcevoir et développer des applications robustes, performantes et évolutives en Java.\nParticiper à la définition de l'architecture et aux choix technologiques.\nRéaliser les développements dans le respect des bonnes pratiques et des standards de qualité.\nMettre en place et exécuter les tests nécessaires pour garantir la fiabilité des solutions.\nOptimiser les performances et la maintenabilité des applications existantes.\nParticiper aux revues de code et aux activités de partage de connaissances.\nCollaborer avec les équipes DevOps pour les processus d'intégration et de déploiement continu.\nAccompagner les équipes et les clients sur les aspects techniques de la solution.\nProfil recherché\nDiplôme supérieur en informatique ou expérience équivalente.\nMinimum 5 années d'expérience en développement Java.\nExpérience significative sur des projets complexes en environnement Agile.\nCapacité à travailler de manière autonome tout en s'intégrant efficacement dans une équipe.\nExcellentes capacités d'analyse, de communication et de résolution de problèmes.\nCompétences techniques requises\nBackend\nJava 11/17+\nSpring Framework (Spring Boot, Spring Data)\nJPA / Hibernate\nJEE (EJB, JMS)\nAPI & Intégration\nREST\nSOAP\nBuild & Qualité\nMaven\nGradle\nTests unitaires et d'intégration\nBases de données\nSQL\nModélisation de données\nCloud & Containers\nDocker\nKubernetes\nFrontend\nAngular\nTypeScript\nHTML5 / CSS3\nDevOps\nGit\nCI/CD\nSoft Skills\nForte autonomie et sens des responsabilités.\nEsprit collaboratif et orientation solution. - très important\nExcellentes compétences relationnelles.\nCuriosité technologique et volonté de partager ses connaissances.\nCapacité à comprendre rapidement les enjeux métier.\nOuvert d'esprit\nInformations sur la mission\nStatut : Freelance\nExpérience : Senior (5 ans minimum)\nDémarrage : À définir\nDurée : Long terme\nLocalisation : À définir (missiosn souvent sur bruxelles)\nMode de travail : Hybride / Remote selon le projet \nCharge : Temps plein privilégié\nNous recherchons un consultant capable d'apporter une réelle valeur ajoutée technique et de s'intégrer rapidement dans des environnements exigeants et dynamiques.\nContactez-moi vite : ","description_format":"text","description_chars":2902,"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":[],"lifecycle":[{"event":"open","at":"2026-10-27T19:59:49Z"}],"visa":[],"liveness":{"score":4,"band":"cold","label":"Long shot","p_open":1,"p_active":0.156,"p_room":0.28,"age_days":131,"expected_fill_days":29,"reasons":["conf:2","agency","stale_co","velocity","win:tail","crowd:"],"computed_at":"2026-10-31T05:58:55Z"},"pay":null,"html_url":"https://alion.io/job/nexin-senior-java-developer-freelance","json_url":"https://alion.io/job/nexin-senior-java-developer-freelance.json","meta":{"generated_at":"2026-11-01T05:19:27Z","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":8168,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-02T00:00:00Z"}},"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":4412981},"rest":"https://alion.io/mcp/rest/get_company?id=4412981"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fnexin-senior-java-developer-freelance"},{"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%2Fnexin-senior-java-developer-freelance"},{"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%2Fnexin-senior-java-developer-freelance"},{"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/nexin-senior-java-developer-freelance\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fnexin-senior-java-developer-freelance"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3356213}},{"tool":"search_jobs","arguments":{"company":"nexin.be","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3356213},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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