About the Company

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At FDJ UNITED, we don't just follow the game, we reinvent it. FDJ UNITED is one of Europe’s leading betting and gaming operators, with a vast portfolio of iconic brands and a reputation for technological excellence. With more than 5,000 employees and a presence in around fifteen regulated markets, the Group offers a diversified, responsible range of games, both under exclusive rights and open to competition. We set new standards, proving that entertainment and safety can go hand in hand. Here, you’ll work alongside a team of passionate individuals dedicated to delivering the best and safest entertaining experiences for our customers every day. We’re looking for bold people who are eager to succeed and ready to level-up the game. If you thrive on innovation, embrace challenges, and want to make a real impact at all levels, FDJ UNITED is your playing field. Join us in shaping the future of gaming. Are you ready to LEVEL-UP THE GAME?

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About the Role

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We are looking for a highly skilled Lead AI Solutions Engineer to design, build, and optimize a Retrieval-Augmented Generation (RAG) system that underpins our self-serve analytics data applications. In this pivotal position, you will develop a scalable RAG platform, integrate multiple data sources, and create intuitive data interactions to empower teams across the organization. As part of our Group's RAG Initiative, you will collaborate with a cross-functional team to implement self-service AI-driven solutions - ranging from NLP Data Analysis and Data Discovery to other “analytics' assistant” we will be deploying to the business to streamlining data access, insights retrieval, and business process automation.

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Responsibilities

• Enhance, build new assistants and maintain existing scalable and modular RAG architectures for data retrieval and generation.
• Develop APIs and microservices and dbt to integrate RAG capabilities with existing data sources (mainly user behaviour data, metadata and semantic layer, stored in Redshift, but also other sources e.g. HR systems, legal repositories, SharePoint, etc.).
• Manage and optimize LibreChat UI and Openweb UI Pipelines for chatbot interactions.
• Build efficient data pipelines to support LLM-based querying, semantic search, and metadata retrieval.
• Integrate structured (SQL-based) and unstructured (documents, reports) data sources for real-time and batch processing.
• Maintain and troubleshoot Airflow pipelines for embedding extraction and document processing.
• Ensure data governance, security, and compliance across all applications.
• Manage Vector Database (PGVector), including indexing and similarity search optimizations.
• Develop interactive UI components to enable self-serve data access and visualization using React or other web frameworks.
• Apps examples: generic text to SQL, funnels, user journeys exploration, retention, features active users, attribution, data exploration tool etc.
• Collaborate with data analysts to enable seamless user experiences for natural language queries and structured analytics and data modelling using dbt.
• Implement query translation and enhancement techniques to improve LLM accuracy and retrieval quality.
• Use AI to speed up code development e.g. Cursor.
• Collaborate with Platform Engineering teams to manage apps Kubernetes deployments on our Cloud.
• Ensure security integrations with Azure SSO and SailPoint.
• Work with the Network & Security team to manage configurations for newly created services.
• Develop unit and integration tests to ensure system reliability and performance.
• Validate applications against real-world data and scenarios to assess LLM accuracy and output quality.
• Deploy applications in Kindred Cloud environments, ensuring scalability and monitoring.
• Use Kubernetes, Docker, Helm and ArgoCD to manage deployments.
• Deliver technical documentation covering system architecture, APIs, and workflows.
• Conduct training sessions for internal teams to facilitate self-service capabilities and ongoing system enhancements.

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Required Skills & Qualifications

• 5+ years of experience in data engineering, backend development, or AI/ML integration.
• Strong knowledge of Python, FastAPI, Flask, or Node.js for backend API development.
• Experience with LLM-based architectures, retrieval-augmented generation (RAG), and NLP techniques.
• Proficiency in SQL, Redshift, and data warehousing concepts.
• Experience integrating structured and unstructured data sources for AI-driven applications.
• Knowledge of dbt, metadata management, and semantic search.
• Familiarity with React or other frontend frameworks for building intuitive UIs.
• Cloud deployment experience in AWS or Kindred Cloud.
• Experience with Kubernetes, Terraform, and Helm for deployment management.
• Strong problem-solving skills and ability to work in a fast-paced, agile environment.

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Nice-to-Have Skills

• Hands-on experience with Vector Databases (FAISS, Pinecone, Weaviate, PGVector, etc.).
• Experience fine-tuning LLMs for domain-specific applications.
• Knowledge of data privacy, governance, and compliance in AI-driven systems.
• Previous work in self-service analytics or AI-powered business intelligence solutions.
• Experience with Javascript for frontend customization.
• Experience with Airflow for ETL workflow orchestration.