Recrutement Decathlon

Apprenticeship - Junior Data Scientist F - M - D H/F - Decathlon

  • Lille - 59
  • Alternance
  • Decathlon
Publié le 30 juillet 2025
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Les missions du poste

YOUR NEXT CHALLENGE

Decathlon is accelerating its digital transformation with the mission to become THE digital sports platform that will allow customers to discover our universe through numerous local experiences centered on sport.

Our goal is to create an open ecosystem to connect many actors and third-party services in a secure and efficient manner.

Our teams based in Lille, Paris and Amsterdam bring together more than 1,500 employees who are united to build and grow digital products with the aim of always offering the best value to our users.

What if Tech allowed us to reinvent tomorrow's sport and become the largest digital sports platform? This is the objective we set ourselves at Decathlon.

"Making the pleasures and benefits of sport sustainably accessible to the many" has always been our mission. A vocation that today reaches its peak by enhancing the sports experience through technology and meeting the needs of our 500 million users worldwide.

We thus create new experiences for athletes - virtual coaching, loyalty programs, intelligent in-store experiences, new and second-hand product offers, as well as rental services for a wide range of Decathlon and partner products.YOUR PLAYGROUND : THE EFFILAB TEAM

Effilab is Decathlon's internal consulting team, entirely dedicated to improving the company's operational efficiency. Our mission is to support Decathlon's various Business Units (BUs) in optimizing their processes.

To do this, we rely on a range of cutting-edge tools and methodologies :
- Process Mining to diagnose inefficiencies
- Robotic Process Automation (RPA) to automate repetitive tasks
- Artificial Intelligence (AI) to develop predictive and cognitive solutions
- And many other analytical and data-driven approaches

By joining Effilab, you will more specifically integrate the Effilab AI branch, the expertise center that leads artificial intelligence projects. This is where we transform complex business challenges into robust and industrialized AI solutions.

This structure places you at the center of the action, in constant interaction with Effilab experts and business teams, to build solutions that will make Decathlon more efficient.

YOUR RESPONSIBILITIES : FROM STRATEGY TO IMPACT

Under the direct mentorship of the AI Program Leader, you will BE part of the entire AI project lifecycle :
- Scoping & Analysis (Discovery) : Take part of discussions with business teams to identify opportunities, define project scope and assess their feasibility.
- Proof of Concept (PoC) : Rapidly develop prototypes to test hypotheses, explore data, experiment with algorithms and demonstrate the value of our approaches.
- Industrialization & Deployment : Actively participate in building and putting into production robust, scalable and secure AI solutions.
- Research & Innovation : BE a driving force by maintaining active technological watch, particularly on LLMs and other applied AI domains.

Le profil recherché

WHAT YOU'LL NEED TO SUCCEED

Education : You are entering your first year of Master's degree (Bachelor +4 level) or equivalent in Data Science, AI or computer science and are looking for a 2-year apprenticeship.

Technical Skills :
- Excellent mastery of Python for Data Science
- Strong knowledge in Machine Learning and statistics
- Good foundations in SQL and NoSQL
- Knowledge of our stack is a plus : Databricks, GCP (Vertex AI, Cloud Run), AWS (Bedrock, Athena), LangChain & LangGraph, PySpark, Docker, GitHub
- Essential English : You will evolve in an international environment. Mastery of English is therefore essential to communicate and access all our technical resources.

Soft Skills :
- Passion for Sport and Impact : Athletic and passionate, you share our mission to "make the pleasures and benefits of sport sustainably accessible to the many" #TechForGood.
- Rigor and Method : You approach challenges in a structured manner, which is essential to guarantee the quality and reliability of the solutions you will develop, from initial analysis to production deployment.
- Proactivity and Autonomy : In our tight-knit team, you will BE more than just an executor. We count on your ability to propose ideas and take initiative to move projects forward autonomously.
- Curiosity and Business Vision : You have a thirst for learning and a strong appetite for technological research. Above all, you are stimulated by the need to understand the complex business challenges of our internal partners to provide creative solutions.
- Communication and Synthesis Skills : You know how to navigate between technical details and the big picture. You are able to popularize complex technical subjects and adapt your discourse to various interlocutors.

WHAT WE OFFER : MUCH MORE THAN AN APPRENTICESHIP
- A Central Role : BE one of the pillars in realizing the team's data science projects, with direct and measurable impact.
- Engaged Mentorship : Benefit from daily support and direct skills transfer from the team Manager.
- Immediate Responsibility : Manage your projects end-to-end and BE the technical contact for the projects you manage.
- An International Dimension : Collaborate with teams worldwide and benefit from knowledge sharing within a global network, offering international career perspectives.
- A Cutting-Edge Technological Environment : Develop your skills and aim for certifications and training through the platforms we offer (Decathlon university, Coursera, etc.)

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