{"id":3611149,"url":"https://alion.io/job/chat3d-senior-ml-engineer-llm-data-3d-hf","title":"Senior ML Engineer — LLM, Data & 3D (H/F)","company":{"id":2313429,"name":"Chat3D","domain":"chat3d.ai","url":"https://alion.io/company/chat3d","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Welcome to the Jungle","truth_index":null},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Lyon, 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":"Fine-tuning","optional":false},{"name":"LLM","optional":false},{"name":"Machine Learning","optional":false},{"name":"Multimodal AI","optional":false},{"name":"Post-training","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"SFT","optional":false}],"status":"live","first_seen_at":"2026-11-02T14:16:45Z","employer_posted_date":"2026-11-02","last_verified_at":"2026-11-03T13:41:30Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Rejoignez Sandflow, une entreprise innovante spécialisée dans le développement de modèles d'IA pour la création et la modification d'objets 3D. En tant que Senior ML Engineer, vous serez responsable de l'entraînement et de l'adaptation de modèles de langage, de l'amélioration de l'efficacité des runs, de la construction des évaluations et de la production d'outils réutilisables. Vous travaillerez en étroite collaboration avec le CTO et des spécialistes de la production 3D.\nMissions\nDévelopper les données d’entraînement : nouvelles sources, génération et transformation, filtrage et évaluation de la qualité.\nEntraîner et adapter des LLM et des modèles multimodaux : préparation des jeux de données, fine-tuning, entraînement distribué, suivi et analyse des résultats.\nConstruire les évaluations : baselines, ablations et mesure de l’effet des données et de l’entraînement sur les capacités 3D.\nProfil recherché\nNous recherchons une expérience confirmée en machine learning et une expertise approfondie en données 3D et/ou en entraînement et adaptation de LLM.\nLe socle indispensable\nLa compréhension du fonctionnement d’un LLM ET la maîtrise des bases de la 3D sont deux prérequis non négociables.\nLLM : comprendre les transformers, la tokenisation, l’apprentissage autorégressif, le fine-tuning et l’inférence.\n3D : maîtriser les bases des maillages et nuages de points, des repères et transformations, des représentations géométriques et du rendu ; savoir manipuler des données 3D et reconnaître leurs défauts.\nPython et PyTorch : écrire, comprendre et déboguer du code d’entraînement.\nRigueur expérimentale : construire une baseline, choisir les métriques, isoler les variables et expliciter les limites des résultats.\nAutonomie et partage : mener un chantier, documenter les décisions et échanger avec l’équipe.\nUne expertise approfondie sur un ou plusieurs axes\nData 3D : acquisition, génération synthétique, transformation, curation et contrôle qualité.\nLLM et multimodal : données, fine-tuning, évaluation et optimisation.\nDes plus, sans être des prérequis\nEntraînement de grands modèles sur plusieurs GPU ou plusieurs nœuds.\nPost-training : SFT, RL et conception de récompenses.\nRecherche appliquée, publications ou contributions open source.\nVos réalisations, votre contribution personnelle et les résultats obtenus priment.","description_format":"text","description_chars":2339,"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":[{"language":"French","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[{"name":"France","iso":"FR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Machine Learning"],"lifecycle":[{"event":"open","at":"2026-11-02T14:23:41Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":29,"reasons":["conf:1","win:early"],"computed_at":"2026-11-03T05:54:40Z"},"pay":null,"html_url":"https://alion.io/job/chat3d-senior-ml-engineer-llm-data-3d-hf","json_url":"https://alion.io/job/chat3d-senior-ml-engineer-llm-data-3d-hf.json","meta":{"generated_at":"2026-11-03T15:34:55Z","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":21645,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-04T00:00:00Z"}},"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":2313429},"rest":"https://alion.io/mcp/rest/get_company?id=2313429"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fchat3d-senior-ml-engineer-llm-data-3d-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%2Fchat3d-senior-ml-engineer-llm-data-3d-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%2Fchat3d-senior-ml-engineer-llm-data-3d-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/chat3d-senior-ml-engineer-llm-data-3d-hf\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fchat3d-senior-ml-engineer-llm-data-3d-hf"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3611149}},{"tool":"search_jobs","arguments":{"company":"chat3d.ai","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3611149},"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); 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