Back to jobs
New

Junior Data Engineer R&D (f/m/d) - Internship

Villeneuve-d'Ascq, Nord, France

The Data Platform team is looking for an intern Data Engineer based in Lille.

At Decathlon, our Data teams drive a powerful technological and organizational transformation to support over 1,800 stores and 100,000+ employees worldwide. Decathlon Digital is the technological powerhouse driving this change, acting as an internal tech lab where custom, game-changing solutions are born.

Within the Data Platform, our priority is to simplify and drive Decathlon’s data-centric transformation. We manage massive data infrastructures for a community of 170+ million customers, ensuring smart decisions are made across every activity—from fabric choices to production forecasts. You will join the team responsible for building Decathlon’s central Data Lake, our single source of truth.

YOUR MISSION

Our Data Lake transforms data through progressive layers to power everything from interactive dashboards to advanced Machine Learning (product recommendations, demand forecasting). As we stack these transformations, manually tracing the origin of data becomes unmanageable.

The core of your internship is to design and implement an automated tracking solution using (Fine-Grained) Data Provenance.

In collaboration with academic experts Pierre Senellart (ENS, PSL University) and Silviu Maniu (Professor, University Grenoble Alpes), as well as our engineering teams, you will be expected to:

  • Contribute to the design and implementation of a Data Provenance tool compatible with Apache Spark.
  • Bridge the gap between theoretical research and industrial reality, exploring algorithmic approaches for massive data scale.
  • Ensure Trust & Reliability by guaranteeing the accuracy of results for data consumers and enabling precise Root Cause Analysis.
  • Solve compliance & testing challenges, ensuring PII data is tracked for GDPR and extracting representative subsets for prototyping.
  • Lead Knowledge Transfer by translating advanced theoretical concepts into accessible insights to upskill the wider Data Engineering team.

TECHNICAL STACK & ENVIRONMENT

  • Good knowledge of SQL, familiarity with relational algebra is a plus
  • Good knowledge of Python, Scala is a plus
  • Git
  • Understanding of distributed systems and parallel processing. 
  • Experience with Big Data technologies (e.g., Apache Spark, Hadoop, Hive, Delta Lake) is a plus.

WHAT YOU BRING

  • Education: Master 1 or Master 2 Student in Computer Science, Data Science, or Applied Mathematics.
  • Problem Solver: You genuinely enjoy tackling challenging algorithmic problems and complex coding puzzles.
  • Research Oriented: You are comfortable reading research papers and exercising critical thinking to adapt theoretical models to specific project needs.
  • Software Craftsmanship: You strive for clean, maintainable code and are eager to apply engineering best practices.
  • Curious & Humble: You are open-minded, ready to question your own assumptions, and enjoy brainstorming with diverse stakeholders.
  • Languages: You are fluent in both French and English, allowing you to collaborate effectively within our international teams.

WHY JOIN US?

  • Sport & Community: You will work in a vibrant workplace that encourages sports practice and team-building moments with your fellow teammates.
  • Brand Ambassador: You will have the chance to test new Decathlon products and share your passion on the field by joining our internal sports clubs.
  • Join a supportive community of interns and apprentice students: collaboration, conviviality, and dedicated events.
  • Learning Culture: You are joining a Happy Trainees 2025 certified company, recognized for providing a high-quality learning environment for interns.
  • Work Tools: Choice of hardware (Mac or Windows) provided in line with your missions and our social responsibility commitments.
  • Commuting: 50% reimbursement of your public transportation pass.

 

DECATHLON DIGITAL CONTEXT 

What if technology allowed us to push the boundaries and take sports experiences to new levels? That's exactly our goal at Decathlon Digital! We are a team of 5,000+ experts in software engineering, product management, data, cloud, and cybersecurity, distributed across Paris, Lille, and Amsterdam. Together, we are creating the largest digital sports platform, leveraging tech innovation from design to value chain optimization, connected experiences and product second life.


Changing the game for good. We are in this for the love of sports. And like everything we love, we want it to last. That’s why we are embarking on a journey to create a more sustainable tech model, reducing our direct environmental impact while maintaining a safe, diverse, and inclusive space for all our people to learn and thrive together. Team up with us to design the digital future of sports.

Create a Job Alert

Interested in building your career at Decathlon Digital EN? Get future opportunities sent straight to your email.

Apply for this job

*

indicates a required field

Resume/CV*

Accepted file types: pdf, doc, docx, txt, rtf

Cover Letter

Accepted file types: pdf, doc, docx, txt, rtf

Select...

RGPD : Lorsque vous postulez à une offre d'emploi sur ce site, les données personnelles concernant votre candidature seront collectées par Decathlon SE, (" Responsable du traitement "), qui est situé au 4 Boulevard de Mons 59650 Villeneuve d'Ascq. Vos données personnelles seront traitées aux fins de la gestion des activités de recrutement du Responsable du traitement. Vos données personnelles seront conservées par Decathlon SE pendant la durée nécessaire à l'évaluation de votre candidature à un emploi sans que cette durée n'excède 2 ans. 

 

  • Vous disposez du droit d'accéder à vos données personnelles, de demander qu'elles soient rectifiées, effacées, et de demander que leur traitement soit limité.
  • Vous disposez également du droit de demander leur portabilité.
  • Vous pouvez accéder à ces droits en cliquant ici.
  • Par ailleurs, vous pouvez également consulter notre politique de confidentialité pour plus d'informations sur les traitements effectués.

 

GDPR : When you apply to a job on this site, the personal data contained in your application will be collected by Decathlon SE, (“Controller”), which is located at 4 Boulevard de Mons 59650 Villeneuve d'Ascq.  Your personal data will be processed for the purposes of managing Controller’s recruitment related activities. Your personal data will be retained by Controller as long as Controller determines it is necessary to evaluate your application for employment but for no longer than 2 years. 

 

  • You have the right to request access to your personal data, to request that your personal data be rectified or erased, and to request that processing of your personal data be restricted.
  • You also have the right to data portability. You can request these rights by clicking here. 
  • In addition, you can also visit our privacy policy for more information on the processing carried out.

 

Diversity & non discrimination policy / Politique de diversité et de non discrimination

As part of our diversity and non-discrimination policy, Decathlon Digital wants to ensure that gender, disability, or age of our candidates are not a factor in our decision. If you wish, we suggest that you provide us with this information. This data will be anonymized and used in the macro analysis of the diversity of applications received. This information will be kept separate from your application and will have no effect on its processing.

___________________

Dans le cadre de sa politique de diversité et de non discrimination, Decathlon Digital souhaite s'assurer que le genre, le handicap, ou l'âge de nos candidat·e·s ne sont pas des facteurs de décision. Si tu le souhaites, nous te proposons de nous indiquer ces informations. Ces données seront anonymisées et utilisées dans l'analyse macro de la diversité des candidatures reçues. Ces informations seront séparées de ta candidature et n'auront donc aucun effet sur le traitement de celle-ci.

Select...
Select...
Select...