{"id":2006896,"url":"https://alion.io/job/celad-ingenieur-python-fastapi-ia-rag-recherche-vectorielle-fh","title":"Ingénieur Python / FastAPI / IA - RAG & Recherche Vectorielle (F/H)","company":{"id":3908314,"name":"Groupe CELAD","domain":"celad.com","url":"https://alion.io/company/celad-2","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"AI/ML","role_family":"AI/ML","seniority":null,"employment_type":"freelance","work_mode":"hybrid","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":{"min":500,"max":700,"currency":"EUR","period":"day","gross":null,"usd_annual":197000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Chroma","optional":false},{"name":"Embeddings","optional":false},{"name":"FAISS","optional":false},{"name":"FastAPI","optional":false},{"name":"LLM","optional":false},{"name":"Milvus","optional":false},{"name":"pgvector","optional":false},{"name":"Pinecone","optional":false},{"name":"Python","optional":false},{"name":"Qdrant","optional":false},{"name":"RAG","optional":false},{"name":"Weaviate","optional":false},{"name":"PostgreSQL","optional":true}],"status":"live","first_seen_at":"2026-10-06T09:31:41Z","employer_posted_date":null,"last_verified_at":"2026-10-06T09:31:41Z","board_verified":false,"closed_at":null,"days_open":21,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":21},"description":"Envie d’un nouveau challenge... CELAD vous attend ! 🚀\nNous poursuivons notre développement et recherchons actuellement un(e) Ingénieur IA Python / RAG pour intervenir chez l’un de nos clients, acteur majeur du secteur juridique et fiscal.\n🚀 Votre rôle\nAu sein d’une équipe technique spécialisée dans les solutions digitales et l’intelligence artificielle, vous participerez au développement et à l’évolution de solutions basées sur l’IA générative.\nVos principales missions seront notamment de :\nConcevoir et développer des applications et services IA en Python ;\nDévelopper des APIs avec FastAPI ;\nConcevoir et améliorer des architectures RAG (Retrieval-Augmented Generation) ;\nTravailler sur la vectorisation, les embeddings et la recherche sémantique ;\nIntégrer et exploiter des LLM dans des applications métier ;\nParticiper aux choix techniques liés au stockage et à la recherche vectorielle ;\nContribuer à l’amélioration de la qualité, de la pertinence et des performances des solutions IA.\nProfil recherché\nDe formation supérieure en informatique, vous disposez d’une expérience significative en développement Python et dans la conception de solutions basées sur l’IA générative.\nVous maîtrisez notamment :\nPython\nFastAPI\nRAG\nLLM / IA générative\nEmbeddings / vectorisation\nRecherche sémantique / vectorielle\nUne expérience avec FAISS, Qdrant, pgvector, Pinecone, Weaviate, Milvus ou Chroma serait un réel plus.\nVous êtes à l’aise dans des environnements techniques exigeants et souhaitez intervenir sur des sujets IA concrets, avec une forte dimension 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