Senior ai Engineer Agentic ai - Python Backend H/F - Collective Works

  • Indépendant
  • Puteaux 92
  • Data et IA
  • Nouveau
Senior ai Engineer Agentic ai - Python Backend H/F Collective Works · Puteaux - 92 · Indépendant

Les missions du poste


Senior AI Engineer (Agentic AI / Python Backend)

Target:Senior Python backend developer who has delivered AI agents in production, ideally with experience in ontologies and knowledge graphs.

Context: Our AI (Engineering) team builds the AI features embedded in our SaaS platform, in an international environment. We are looking for a senior consultant to strengthen the team. The consultant will report to the Head of Data & AI.

Key responsibilities

  • Design and develop the backend components of AI features (SaaS and on-premise) running in production.

  • Build AI agents: multi-agent systems, workflow orchestration and LLM-driven reasoning.

  • Develop MCP servers and custom tools that connect agents to applications, APIs and databases.

  • Design RAG / Agentic AI architectures based on vector databases, knowledge graphs and ontologies.

  • Set up an AI gateway (such as LiteLLM) for model routing, governance and cost control.

  • Implement observability and evaluation for AI services (OpenTelemetry, LangSmith, Langfuse...).

  • Mentor junior developers and help shape AI engineering best practices.

Must-have skills

  • Python / FastAPI: expert level, REST APIs, microservices, asynchronous programming.

  • Generative AI in production: significant, proven experience (not only POCs).

  • LangChain / LangGraph or equivalent, multi-agent systems.

  • MCP (Model Context Protocol) and A2A (Agent-to-Agent).

  • RAG: vector search, embeddings, context optimization.

  • Ontologies / knowledge graphs: business domain modeling and semantic reasoning. This is the core requirement for this role.

  • OpenTelemetry, Docker, CI/CD, Git, testing (pytest).

  • SQL (SQL Server, MySQL) and vector databases (Elasticsearch or equivalent).

Nice to have

  • Neo4j or another graph database (strongly preferred)

  • LiteLLM or another LLM gateway

  • LangSmith / Langfuse / Arize Phoenix

  • GKE / Google Cloud

Profile

  • Senior backend developer with real expertise in agentic AI, autonomous and able to contribute quickly.

  • Strong communicator, comfortable working in English with international teams.

  • Able to mentor junior team members.

Practical information

  • Start date: ASAP

  • Location: Puteaux (hybrid model - 2 days work from office)

  • Languages: French / English

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