Agency : Havas Media Group Spain Job Description : .

We're looking for a Integral Product Engineer AI to build and ship AI-powered features for Havas data products. You'll combine strong backend engineering with product thinking building scalable applications, integrating LLM and advertising APIs, and deploying services to production. Working with product managers and data teams, you'll deliver features for Converged Activate and Match.AI that enable campaign automation and insights for global brands.

Main Responsibilities

- Product Engineering
- Translate product requirements into technical solutions for AI-driven features
- Build and deploy Python-based applications and APIs using FastAPI or Flask
- Collaborate with product teams to design user-centric workflows powered by AI

- AI & API Integration

- Integrate LLM APIs (Gemini via Vertex AI, GPT via Azure OpenAI) for use cases like audience generation, creative insights, and campaign optimization
- Connect external advertising APIs (Meta, Google Ads, TikTok, Amazon Ads) to enable campaign automation
- Implement prompt engineering and response parsing for reliable AI behaviours

- Cloud Deployment

- Deploy and maintain services in Google Cloud Run or similar environments
- Implement CI/CD pipelines for application releases with best practices for security and performance

- Collaboration

- Work cross-functionally with product managers, designers, and data scientists
- Communicate technical concepts clearly to non-technical stakeholders

Previous Experience

4+ years of professional experience

Language Skills

Fluent in English

Key Competencies

- Strong Python development skills (FastAPI, Flask, pandas)
- Experience building and deploying production web services
- Hands-on experience with LLM APIs (OpenAI, Anthropic, Google, etc.)
- Understanding of RESTful API design and third-party integrations
- Experience building and deploying web services to cloud environments (Cloud Run or similar)




- Solid understanding of data structures, algorithms, and software engineering principles
- Comfortable with Git, Docker, and cloud deployment workflows
- Product mindset: focus on shipping working features iteratively
- Ability to work in a multicultural environment and communicate effectively

Nice to have

- Experience with AI orchestration frameworks (LangGraph, CrewAI, Google ADK)
- Exposure to multi-agent systems and agentic workflows
- Familiarity with advertising ecosystem, CDPs, and campaign performance data
- Experience with Google Cloud Platform (Cloud Run, Vertex AI)
- Knowledge of RAG patterns, embeddings, or vector databases

Contract Type : Permanent

Here at Havas across the group we pride ourselves on being committed to offering equal opportunities to all potential employees and have zero tolerance for discrimination. We are an equal opportunity employer and welcome applicants irrespective of age, sex, race, ethnicity, disability and other factors that have no bearing on an individual’s ability to perform their job.

About Us

Founded in 1835 by Charles-Louis Havas, Havas is one of the world’s largest global communications groups, with more than 23,000 people in over 100 countries sharing one single mission: to make a meaningful difference to brands, businesses, and people. Havas has developed a fully integrated model covering all communications activities. The teams of the three business units, Creative, Media and Health & You, work together with agility and in perfect synergy to offer clients tailor-made, meaningful,



innovative and entertainment-oriented solutions that support them in their positive transformation.

Life at Havas

We take great pride in our Havas family. They bring many unique personalities, perspectives and passions to their work. Collaboration is at the core of how we operate, and Havas Villages are the homes we work in. We encourage our people to take advantage of our many opportunities to learn and grow. Through local agency training sessions, our unique global and development programs, we offer our people endless opportunities to explore.

Havas Media Network

We create the best media experience, capitalizing on the most meaningful media to build more meaningful brands. We know how to connect a client with their target audience – in the context of where they are, through the content they pay attention to. We deliver this expertise through the Mx System, our global operating methodology and strategic planning process, that creates value for our clients by turning consumer intelligence into clear growth targets, aligning stakeholders and KPIs, and measuring the impact of media experiences.

Havas Creative Network

At Havas, we believe creativity isn’t just a description of our business, it is part of our agencies’ DNA. We bring together some of the industry’s most creative and accomplished agencies. By combining creative expertise with the strategic and innovative power of our Villages, we can build seamless teams around the individual needs of each of our clients.

Havas Health

Driven by human purpose and focused on the betterment of humanity through health, Havas Health & You leverages a global collection of experts and individuals to help people everywhere live healthier lives. With a spirit rooted in innovation, creativity, and education, we are dedicated to delivering consistent excellence and groundbreaking work.

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📌 AI Product Engineer - Midweight (Madrid)
🏢 Havas Media Group Spain
📍 Madrid