Senior Java Engineer - Sport User Intelligence (f/m/d)

We are looking for talented Senior Software Engineers, based in Lille >> Kindly send your resume in english. At Decathlon , we're passionate about bringing people together and make wellbeing accessible for all.. Our mission is to inspire and enable people to embark on, and enrich their sporting journey, whether they are curious or demanding, beginner or professional. Through innovative product design, sustainability initiatives, and a commitment to customer satisfaction across channels, we aim to revolutionize the way people experience sports. The Know Your Customer domain is dedicated to building 360° customer insights, driving powerful business levers through an increasingly personalized digital lifecycle. We are currently scaling from local teams to a global organization, spearheading a massive technological transition (Full APIs, Data/Event-Driven Architecture, Microservices, Headless). Operating in 45+ countries with 200 million accounts, we handle 30,000 new sign-ups daily and billions of interactions across channels. Our mission? Delivering the best personalized sport and product recommendations, tailored to each customer's journey and interactions within the Decathlon eco-system If you're passionate about leveraging technology to enhance the sports experience for hundreds of millions of customers in 70 countries around the world, we want to hear from you. Are you ready to play? In this stimulating environment, your role will be to shape the personalization offering of tomorrow, alongside the software that powers it. Architecture: Design and evolve microservices (Java 21, SpringBoot 3) ensuring high availability and resilience for global traffic (30k new users/day). Collaboration: Collaborate closely with Data Scientists and Engineers to build high-performance APIs that expose personalized recommendations to our customers. Act as a technical multiplier by conducting high-quality code reviews, facilitating knowledge sharing, and mentoring peers without formal