Company Description

Publicis Groupe, the world's second largest communications group, is a solutions platform that is present in more than 100 countries and has more than 98,000 employees. With a unique work philosophy, The Power of One puts clients at the center by promoting the growth of their business through creative agencies (Publicis, Leo Burnett, Publicis Health, Wysiwyg, Nurun and Digitas), media (Zenith, Starcom, Spark and Performics), and areas of transversal knowledge.
Publicis Groupe links Creativity, Technology and Data offering a value proposition that effectively connects brand and consumer.

Overview

We are looking for a AI Developer Senior to play a key role in designing, shaping, and evolving the next generation of agent-based architectures.
You will work closely with cross-functional teams to build innovative solutions that transform how brands operate, make decisions, and create value.

Responsibilities

You will lead the design and development of the backend architecture powering conversational agents and LLM-based systems, ensuring scalability, robustness,



and long-term evolution.
You will work on:
- Orchestrating intelligent agents and multi-agent systems
- Integrating foundation models (e.g. Google Gemini, Azure OpenAI)
- Designing scalable APIs, including real-time streaming capabilities
- Building cloud-ready infrastructure for production environments

Your work will directly impact tools used by strategy, media, creative, and data teams.

AI Agent Development
- Design and build AI agents using frameworks such as Google ADK, LangChain, or similar
- Implement complex workflows with tool calling (search, retrieval, APIs, databases)
- Optimize prompts and evaluate response quality

Backend & APIs
- Develop asynchronous APIs using FastAPI
- Design modular and scalable architectures
- Implement real-time streaming endpoints (SSE, WebSockets)

LLM Integration
- Integrate with APIs like Google Gemini or Azure OpenAI
- Manage context, grounding,

📌 AI Developer Senior (Madrid)
🏢 Publicis Groupe
📍 Madrid