Data Scientist

Data Scientist – AI & Machine Learning

Location: Brussels, Belgium (50% on-site / 50% remote)

Contract: Freelance – ASAP until December 2027

Languages: Fluent English and either Dutch or French

We are looking for an experienced Senior Data Scientist to join a dynamic team working on innovative Artificial Intelligence and Machine Learning solutions.

This is an exciting opportunity to work on advanced predictive models, Generative AI and Large Language Model (LLM) applications, transforming complex data into actionable business insights.

You will be involved in the full data science lifecycle, from understanding business needs and developing models to deploying, monitoring and optimising solutions in production.

Key Responsibilities

• Design and develop machine learning and AI models to address business challenges.
• Build predictive models to improve customer segmentation, behavioural analysis and personalised engagement.
• Develop data pipelines to process and structure digital and web analytics data.
• Use LLMs and NLP techniques for text classification, customer intent detection and automated summarisation.
• Fine-tune, evaluate and deploy LLMs and embedding models.
• Implement RAG solutions, model validation and responsible AI practices.
• Monitor and optimise models in production using appropriate MLOps tools.
• Communicate technical findings and translate data insights into business recommendations.

Skills & Experience

• Minimum 5 years of relevant Data Science experience.
• Advanced Python skills, including Scikit-learn, Transformers, PyTorch and TensorFlow.
• Strong experience developing, fine-tuning and deploying LLMs and embedding models.
• Good knowledge of machine learning, deep learning, statistics and experimental design.
• Hands-on experience with NLP, text classification, RAG, model explainability and AI guardrails.
• Experience with MLflow and ML model lifecycle management.
• Knowledge of customer journey modelling and Next Best Action approaches.
• Strong SQL, Git and Bash skills.
• Fluent English and fluent French or Dutch (written and spoken).
• Master's degree or higher in Computer Science, Mathematics, Statistics or another quantitative discipline, or equivalent professional experience.

You are an analytical and proactive professional who can take ownership of projects from start to finish. You communicate effectively with technical and business stakeholders, work autonomously and enjoy collaborating within a team.

If you have a strong background in Data Science, Python and Generative AI, and are looking to work on challenging AI-driven projects, we would love to hear from you!