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Colruyt Group

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Data Scientist / AI Solution Engineer

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Summary

Build and run production AI systems for a large retailer: develop agentic LLM applications and RAG pipelines, engineer Python/FastAPI services with testing and CI/CD, and deploy/monitor solutions on Azure (AI Foundry, AI Search, OpenAI, Functions, Cosmos DB).

Responsibilities:

AI & Agentic Application Development

· Design, develop, and deploy AI-powered applications using LLMs and Agentic AI architectures.

· Build reliable AI workflows utilizing tool/function calling, structured outputs, memory management, state handling, and error recovery.

· Implement and maintain production AI systems with strong focus on scalability, observability, security, and reliability.

· Leverage AI-assisted development tools for coding, code review, testing, and validation.

· Define and execute AI evaluation frameworks, including experimentation, model assessment, performance measurement, and statistical analysis.

Python Engineering & API Development

  • Develop high-quality, maintainable Python applications following software engineering best practices.
  • Build and maintain RESTful APIs using FastAPI.
  • Implement API contracts, request/response validation using Pydantic, and streaming responses.
  • Develop automated test suites and maintain CI/CD pipelines.
  • Apply asynchronous programming techniques to improve application performance and scalability.

RAG, LLMs & Machine Learning

  • Design and implement Retrieval-Augmented Generation (RAG) solutions.
  • Optimize chunking strategies, embeddings, hybrid retrieval, reranking, and retrieval quality.
  • Evaluate and improve AI system performance using quantitative metrics.
  • Apply machine learning techniques to predictive and prescriptive business problems.
  • Demonstrate strong understanding of LLM architecture, tokenization, embeddings, transformers, attention mechanisms, and model limitations.

Data & Business Translation

  • Translate business requirements into measurable technical solutions and acceptance criteria.
  • Design and optimize data models for SQL and NoSQL databases.
  • Work with Cosmos DB and other scalable data platforms.
  • Collaborate with product, business, and engineering teams to deliver end-to-end solutions.

Azure AI & Cloud Solutions

  • Design AI solutions utilizing:
  • Azure AI Foundry
  • Azure AI Search
  • Azure OpenAI / LLM Services
  • Azure Functions
  • Azure Cosmos DB
  • Azure Blob Storage
  • Deploy, monitor, troubleshoot, and optimize AI applications on Azure.


Profile Description:

  • 10+ years of software engineering experience, with 5-6+ years focused on AI, GenAI, LLMs, and cloud-native application development.
  • Strong Python expertise with proven experience in building scalable, maintainable, and well-tested applications.
  • Hands-on experience developing APIs using FastAPI, Pydantic, asynchronous programming, and streaming responses.
  • Proven track record delivering production-grade AI solutions, including deployment, monitoring, troubleshooting, and operational support.
  • Experience building Agentic AI applications using tool/function calling, structured outputs, workflow orchestration, memory, and state management.
  • Strong understanding of RAG architectures, embeddings, hybrid search, reranking, and retrieval evaluation.
  • Solid foundation in machine learning, statistics, experimentation, and AI model evaluation.
  • Deep understanding of LLM concepts, including tokenization, embeddings, transformers, attention mechanisms, and model limitations.
  • Experience implementing AI safety, observability, prompt-injection protection, and data governance practices.
  • Hands-on experience with LangGraph or similar orchestration frameworks.
  • Strong knowledge of SQL and NoSQL databases, including Cosmos DB and data modeling best practices.
  • Experience working with Azure AI Foundry, Azure AI Search, Azure OpenAI, Azure Functions, Blob Storage, and related Azure services.
  • Ability to translate business requirements into measurable outcomes and scalable technical solutions.
  • Familiarity with CI/CD, Agile/Scrum methodologies, and modern software engineering practices.
  • Strong problem-solving, communication, stakeholder management, and collaboration skills.
  • Demonstrates ownership, continuous learning, knowledge sharing, and a passion for engineering excellence.
  • Exposure to Polars, Kedro, Grafana, advanced data engineering, and advanced machine learning techniques is a plus.



Nice to have Competencies:

  • Working experience in a SAFe environment is a plus.
  • Experience working with European clients


Skills

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