We're looking for a Junior Product Engineer to support the development of AI-powered features for HAVAS data products. You'll work alongside senior engineers and product teams to build, test, and deploy backend services and API integrations. This is a hands-on role where you'll learn to build scalable applications, integrate AI and advertising APIs, and contribute to production features for Converged Activate and Match.AI.

Main Responsibilities

Product Engineering Support

- Support the development of AI-driven features by implementing technical requirements under guidance
- Build and maintain Python-based applications and APIs using FastAPI or Flask
- Collaborate with senior engineers and product teams to understand and implement user-facing features

AI & API Integration

- Assist with integrating LLM APIs (Gemini, GPT) for use cases like audience insights and content generation
- Help connect external advertising APIs (Meta, Google Ads, TikTok, Amazon Ads)
- Learn and apply prompt engineering techniques to improve AI outputs

Cloud Deployment & DevOps

- Deploy services to cloud environments (Google Cloud Run) with support from senior team members
- Participate in CI/CD processes and learn deployment best practices
- Monitor application performance and troubleshoot issues

Learning & Collaboration

- Work closely with cross-functional teams including product managers, designers, and data scientists
- Participate in code reviews and learn from senior engineers
- Document your work and communicate progress effectively

Education

- Bachelor's degree in Computer Science,



Data Science, Engineering, or related field (or equivalent practical experience)

Previous Experience

- 0-1 years of professional experience or strong internship/project portfolio

Language Skills

- Good working knowledge in English

Key Competencies

- Basic Python programming skills (familiarity with frameworks like FastAPI or Flask is a plus)
- Understanding of APIs and how to work with them
- Foundational knowledge of software development principles and data structures
- Eagerness to learn about LLM technologies and AI applications
- Basic familiarity with Git and version control
- Problem-solving mindset and attention to detail
- Strong communication skills and ability to ask questions
- Comfortable working in a collaborative, multicultural team environment

Nice To Have

- Exposure to cloud platforms (Google Cloud, AWS, or Azure)
- Any experience with AI/ML projects (coursework, personal projects, or internships)
- Basic understanding of Docker or containerization concepts
- Interest in advertising technology or digital marketing
- Participation in coding bootcamps, hackathons, or open-source projects
- Familiarity with API testing tools (Postman, curl)

What You'll Learn

- Production-grade Python development and API design
- Working with cutting-edge LLM technologies in real business applications
- Cloud deployment and DevOps practices
- Advertising technology ecosystem and campaign automation
- Agile product development workflows
- Cross-functional collaboration in a integral organization

📌 Junior Product Engineer - AI (Madrid)
🏢 Havas Media Network España
📍 Madrid