Senior MTA AI Developer - Freelance (M/F)

France | Oct. 3, 2026

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Company: Collective.work

Country: France

Type: Onsite

Employment: Full-time

Description: Daily rate (TJM): 500

CONTEXT

The MTA (Modelling and Advanced Technologies) team designs and industrializes the AI ​​components used by the professions. Its main missions include:

* API development
* Chatbot development: internal (e.g. Jarvis) and external (business assistants)
* Creation of AI agents capable of executing workflows, interacting with APIs, orchestrating tools, and automating complex tasks
* Advanced integration of LLM models: Mistral, GPT, Claude, etc.
* Technical contribution to cross-functional platforms: IALAB, IAP, GED/PHX, RPA, etc.
* Participation in system demonstrations: chatbot topics, automated workflows, IALAB, etc.

To support the rise of AI uses, the client wishes to strengthen the MTA team with an experienced developer specialized in AI agents, orchestration, advanced chatbots and IS integrations.

MISSIONS

*

   Develop advanced AI agents for businesses

   * Design of agents capable of calling APIs, triggering internal tools, and executing complex actions
   * Multi-step scenario management: analysis, decision, action, supervision
   * Construction of "AI tooling": actions, connectors, permissions, wrappers
   * Alignment with SSI, DPO and AI governance procedures
  
*

   Design or improve business chatbots

   * Development of AI assistants to manage documentation, workflows, document qualification, etc.
   * Implementation of key mechanisms: memory, information retrieval, contextualization
   * UX optimization of interactions: prompts, actions, structured responses
   * Multi-model support: Mistral Large, GPT-4o, Claude 3.7, etc.
  
*

   Integrate and orchestrate with Bpifrance IS

   * Secure calls to internal APIs: ERP, GED, RPA, CRM, PHX, etc.
   * Connection to existing orchestration tools: RPA, IALAB, document pipelines
   * Implementation of tool executors with fine management of authorizations and logs
  
*

   Industrialize and make reliable

   * Complete observability: logs, metrics, traceability, cost monitoring
   * Unit and end-to-end tests for chatbots and agents
   * Contribution to internal frameworks: in-house libs, AI conventions
   * Participation in system demos, PI planning and Agile increments

TOOLS & ENVIRONMENT

*

   Languages and frameworks:

   * Expert Python (FastAPI, async, modular architectures)
   * Node.js/TypeScript for certain front agents or integration services
   * API-first oriented development
   * Cloud architecture patterns: Azure Functions, containers, CI/CD
   * DevSecOps: You Build It And You Run It
  
*

   AI and agents :

   * Design of tooled AI agents (ReAct, Agentic Workflow, Toolformer-like)
   * Agent frameworks: LangChain, LlamaIndex, CrewAI, Semantic Kernel or equivalents
   * Mastery of LLMs: Mistral, GPT, Claude
  
*

   Chatbots:

   * Design of complex conversational flows
   * Integration of memory modules, RAG, reformulation
   * Optimization of advanced prompts
   * Conversational UX: turn-taking, automatic clarifications
  
*

   Integration and data:

   * Internal REST/GraphQL API calls
   * Interaction with EDM, document bases, data lakes
   * Use or construction of business connectors
  
*

   Quality, security and governance:

   * Logs, audit, monitoring: Grafana, Prometheus, Langfuse
   * Agent security: action permissions, order filtering, sandboxing, internal AI compliance
  
*

   Internal tools: ERP, EDM, RPA, CRM, PHX, IALAB, IAP

*

   Other technologies: Kafka, Azure Functions

WORKING CONDITIONS

* Call for tender reference: RFP-269356-1
* Position to be filled on mission
* Agile environment with participation in rituals and demonstrations
* Cross-functional collaboration with business and technical teams

1.  Python expert

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