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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Staff Engineer Backend & Saas Integration Martech H/F - **Company:** Littlebig Connection (part Of Mantu) - **Location:** Lille, France - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Software as a Service, Cloud Computing, Software Quality, Cyber Security, Information Systems, Continuous Integration, Data Governance, Data Sharing, DevOps, Web Development, Distributed Systems, Github, Interoperability, Message Broker, Node.Js, Software Architecture, Systems Development Life Cycle, Software Engineering, Data Streaming, Systems Integration, Google Cloud, System Availability, Backend, Kotlin, Event Driven Architecture, Kubernetes, Avro, Apache Kafka, Graphql, Restful APIs, Terraform, Webhooks, Api Management, Microservices - **Published:** August 14, 2026 - **Apply:** https://www.hellowork.com/fr-fr/emplois/82300839.html ## About the Role Profile wanted8+ years of experience in back-office software engineering and distributed architecture designProven expertise in integrating large third-party SaaS solutions (REST/GraphQL APIs, Webhooks, Message Brokers)Mastery of AI Augmented SDLC (copilot, bmad, mcp servers)Mastery of data governance concepts, IT security, and scalable systemsDemonstrated ability to drive a cross-cutting technical vision and positively influence multidisciplinary teamsExcellent communication skills in both French and English (international environment)Knowledge and experience in Martech context is a strong advantageExpertise in microservices architecture, API, Kafka, Java, and back-end web developmentConfirmed skills in Cloud OPS (AWS / GCP, Kubernetes, CI/CD tools like GitHub Actions, Terraform), 1. 8+ years of experience in back-office software engineering and distributed architecture design 2. Proven expertise in integrating large third-party SaaS solutions (REST/GraphQL APIs, Webhooks, Message Brokers) 3. Mastery of AI Augmented SDLC (copilot, bmad, mcp servers) 4. Mastery of data governance concepts, IT security, and scalable systems 5. Demonstrated ability to drive a cross-cutting technical vision and positively influence multidisciplinary teams 6. Excellent communication skills in both French and English (international environment) 7. Knowledge and experience in Martech context is a strong advantage 8. Expertise in microservices architecture, API, Kafka, Java, and back-end web development 9. Confirmed skills in Cloud OPS (AWS / GCP, Kubernetes, CI/CD tools like GitHub Actions, Terraform) ## Description Within the digital division, the team designs and evolves strategic software architectures to support the group's global growth. Composed of passionate experts (Tech Leads, Software Engineers, Architects), the team aims to modernize the information system, streamline back-office operations, and integrate high-performing, secure SaaS solutions. This role will directly impact the operational robustness of tools and the value delivered to millions of sports lovers and teammates worldwide. Profile analysis starts from September 1st Interviews during weeks 36 & 37 Starting date: end of September / beginning of October Missions - Define, design, and ensure the technical architecture of back-office solutions and complex SaaS integrations at scale. - Guide and upskill engineering teams on software engineering best practices, code quality, and security standards. - Drive the seamless integration of strategic SaaS solutions into the IT ecosystem, ensuring interoperability, scalability, and high availability. - Work closely with Product Managers, Engineering Managers, and Software Engineers to translate business challenges into ambitious technical roadmaps. Technical Stack - Back-end: Java / Kotlin / Node.js, microservices - Event Streaming: event-driven architectures with Kafka, CloudEvents, Avro - SaaS & Integration: API Management, Data Sharing - Cloud & DevOps: AWS / GCP, Kubernetes, CI/CD (GitHub Actions, Terraform) Skills - Microservices architecture - Expert - API - Expert - Cloud Operations - Confirmed - Back-end web development - Expert - Kafka - Expert - Java - Expert, API SaaS Google cloud platform AWS Kotlin Kubernetes Node.js KAFKA Terraform API REST Java ## Related Videos - [Next Level Enterprise Architecture: Modular, Flexible, Scalable, Multichannel and AI-Ready?](https://www.wearedevelopers.com/videos/1017-next-level-enterprise-architecture-modular-flexible-scalable-multichannel-and-ai-ready) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [From event streaming to event sourcing 101](https://www.wearedevelopers.com/videos/91-from-event-streaming-to-event-sourcing-101) - [Bringing AI Model Testing and Prompt Management to Your Codebase with GitHub Models](https://www.wearedevelopers.com/videos/1536-bringing-ai-model-testing-and-prompt-management-to-your-codebase-with-github-models) - [Why Kotlin is the better Java and how you can start using it](https://www.wearedevelopers.com/videos/661-why-kotlin-is-the-better-java-and-how-you-can-start-using-it) ## Related Articles - [Best Companies to Work For in Paris: Top 25 Companies in 2023 ](https://www.wearedevelopers.com/magazine/190-best-companies-to-work-for-in-paris-top-25-companies-in-2023) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe)