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Senior Platform Engineer

DecathlontechnologyLille - Btwin Village, Nordarbeitnowpublished 09/19/2026
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Must-have:PythonGitGoogle CloudCloudDevOpsAgileCI/CDSeniorPrincipal
Nice-to-have:Security
Machine translation — original language: French.Show original

Senior Platform Engineer

About the role and the team

Cloud Platform Engineering (CPE) is a Business Unit of nearly 200 people that continues to strengthen to support Decathlon's tech ambitions. Our main objective is to streamline the technical product catalog and provide turnkey services for IT teams, allowing them to focus on developing high-impact application features.

Within CPE, you will join the Cloud Dev team. Our mission is to provide essential and abstracted Cloud functionalities, applying software engineering development best practices to unify, secure, and optimize our platforms.

You will join a human-sized team composed of passionate engineers. We are fans of software development, Infrastructure as Code, DevOps/SRE culture, automation, technology monitoring... and of course, sport!

Scope and missions of a Platform Engineer

As a Platform Engineer, you will play a central role in empowering development teams through platform engineering. Your missions will revolve around the following pillars:

1. Software Engineering & Cloud Abstraction

  • Use development best practices (Software Engineering, Software Architecture) to design clean, robust, and maintainable code, creating abstraction layers above the Cloud.
  • Develop and industrialize APIs, internal tools, and infrastructure modules in Python and Go.
  • Consume and orchestrate Serverless services (Google Cloud Functions, Google Workflows) and modernize deployment tooling.

2. Infrastructure as Code & DevSecOps Automation

  • Design, test, and deploy infrastructure consistently and automatically with Terraform.
  • Build and optimize modern CI/CD pipelines (preferably with GitHub Actions) integrating DevSecOps security standards from the design phase.
  • Automate recurring tasks through scripting (Python, Bash) to reduce manual effort and maximize reliability.

3. Cross-functional Integration & Operational Excellence

  • Collaborate closely with Network, Security, and Database teams to ensure smooth, high-performance, and secure integrations.
  • Run Captain role: take charge of level 2/3 support, incident analysis, and service request processing to ensure operational stability.
  • Contribute to the definition and compliance of SLO/SLI as well as the MTTR reduction process by automating the resolution of recurring problems.

4. Support, Sharing & Product Culture

  • Write clean technical documentation and user guides to facilitate the adoption of platform services.
  • Raise awareness and train technical teams on best practices for using the developed components.
  • Participate in collective animation via agile management of our deliverables in JIRA and promote knowledge sharing within the team.

What you will need to succeed

  • Experience & Dev: At least 3 years of experience in Python development with a solid mastery of modern software engineering practices.
  • Cloud Expertise: Strong skills and proven experience on Google Cloud Platform (GCP).
  • Infrastructure as Code & CI/CD: Mastery of Terraform and very good practice with CI/CD pipelines (ideally GitHub Actions).
  • Scripting & Serverless: Good knowledge of automation (Python, Bash) and Serverless / event-driven architecture.
  • Soft Skills & Team Spirit: Excellent interpersonal skills, strong sense of internal customer/user satisfaction, rigor in documentation, and ease in solving complex problems.
  • Languages: Proficient in English, both spoken and written, minimum B2 level.
  • A plus: Knowledge of the Go language, use of Google Workflows, or a GCP certification (Associate Cloud Engineer or Professional Cloud Developer).

What we offer

  • Team Spirit & Sport: A passionate sporting community and dedicated time for practicing sport.
  • Work Environment: Possibility to work in one of the Decathlon Digital offices in Paris or Lille and 2 days of teleworking per week.
  • Work Equipment: Recent hardware in accordance with your missions and technical needs.
  • Opportunities & Mobility: A local team within a global network, offering international career possibilities.
  • Professional Development: Continuous support in developing your skills (diversity of projects, certifications, internal and external training...).
  • Compensation Package: Attractive package including employee participation in company shares as well as monthly, quarterly, and annual bonuses.

DECATHLON DIGITAL

Imagine if technology allowed us to push boundaries and offer unprecedented sporting experiences. That is precisely our ambition at Decathlon Digital! We are a team of over 5,000 experts in software engineering, product management, data, cloud, and cybersecurity, spread across Paris, Lille, and Amsterdam. Together, we are creating the largest digital sports platform, leveraging technological innovations to optimize the value chain, design connected experiences, and give a second life to our products.

Let's change the game for good. Our passion for sport guides us and we want it to endure. That is why we are committed to building a more sustainable technological model, by reducing our direct impact on the environment, and by creating a safe and inclusive space to learn and thrive together. Join the team and let's shape the future of sport.

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