Job Description

Agency :

Havas Media Group Spain

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)

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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 global organization

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.