Senior Data Scientist Consultant

h3Mission Overview: /h3 pKeystone Solutions is looking for a Senior Data Scientist for a consultancy mission with a client in Brussels. You will be hired by Keystone Solutions and work as a K-Stone consultant within the client's Marketing and Communication environment, with 50% mandatory on-site presence in Brussels and 50% telework. The Predictive Models team provides responsible AI models that enable impactful and efficient campaigns by optimizing reach and relevance for customers and employees. /p h3Function and

Responsibilities:
/h3 pAs a Keystone Solutions consultant, you will join a team of motivated data scientists who are eager to learn, collaborate and share expertise. You will bring a proven track record in building and deploying data science models and expertise in using LLMs for text classification and summarization. Under Keystone Solutions' consultancy model, your responsibilities will include: /p ul liTackle various business challenges by creating responsible AI models to answer the needs of Marketing and Communication and make campaigns more relevant and impactful. /li liCapture business needs, determine feasibility, build models and analyses to identify the most relevant target groups, and set up tests to measure model impact. /li liBuild models to support customer journey-driven marketing campaigns. /li liBuild pipelines that clean and structure web analytics and use LLMs to detect customer intent. /li liDevelop and deploy automated summarization models using LLMs or traditional NLP methods. /li liApply guidelines and best practices, including explainability, for building responsible AI models. /li liMonitor and deploy AI models in production using a comprehensive stack of tools. /li liPresent technical concepts as clear, actionable insights to business owners and advise them on the use of models in campaigns. /li /ul h3Language

Requirements:
/h3 ul liFluent spoken and written English. /li liFluent spoken and written Dutch OR fluent spoken and written French. /li /ul h3Education: /h3 pYou have a Master's degree or higher in a quantitative field such as statistics, mathematics or computer science. Candidates with other academic backgrounds and substantial experience in data science are also encouraged to apply. /p h3Required Experience and Knowledge: /h3 pYou have at least 5 years of relevant experience. /p h3Mandatory Technical

Experience:
/h3 ul liExpert-level Python programming and expertise in the Python data science environment, including scikit-learn, transformers, PyTorch and TensorFlow. /li liProven ability to fine-tune, evaluate and operationalize LLMs and embedding models for production use in marketing contexts. /li liSolid understanding of statistical methods, experiment design and machine learning algorithms, including traditional machine learning and deep learning. /li liExpertise in using LLMs for text classification, RAG, interpretability, guardrails and validation of LLM-driven predictions. /li liHands-on experience with MLflow for experiment tracking, model versioning and CI/CD pipelines in AI/ML workflows. /li liExpertise in customer journey modeling, such as next best action. /li liExperience with Git and Bash. /li liExperience with SQL. /li /ul h3Preferred Technical

Experience:
/h3 ul liExperience with active learning techniques to iteratively improve models. /li liExperience with uplift modeling. /li liExperience with Marketing Mix Modeling and optimization under constraints. /li liExperience with SAS. /li liExperience with Streamlit. /li /ul h3Working Model: /h3 pThis consultancy mission requires 50% mandatory presence at the client's Brussels office and allows 50% telework. As a Keystone Solutions consultant, you will represent Keystone Solutions at the client site while collaborating closely with client stakeholders and fellow specialists. /p h3Soft

Skills:
/h3 ul liTake ownership and demonstrate the ability to drive projects end-to-end with minimal guidance. /li liAbility to translate data insights into actionable business recommendations. /li liQuick learner and autonomous. /li liClear and concise communication. /li liTeam player. /li liProactive attitude and results-driven approach. /liliAnalytical and problem-solving mindset. /li /ul h3Why Keystone Solutions: /h3 pAs a K-Stone, you bring Keystone Solutions' core values to every engagement while building your consultant identity through meaningful on-site collaboration. Our consultancy model gives you exposure to dynamic projects and diverse challenges across client environments, creating turbo-charged learning through broad technical, business and stakeholder experiences. Keystone Solutions also supports skyrocketing ambition by enabling continued professional development and career growth across challenging consultancy assignments. /p