Senior Data Engineer - brussels Freelance Contract: 02/02/2026 - 31/12/2026 Onsite/Hybrid (50% after onboarding) Fluent in french, dutch and english. We are seeking a hands-on Senior Data Engineer to join a Corporate Banking team. You will design, optimise, and maintain data workflows, dashboards, and ad hoc reporting solutions, ensuring high-quality, reliable data for business users. Key responsibilities Enhance and streamline Alteryx workflows, rationalise legacy SAS processes, and reduce technical debt Collaborate on data integration, ensuring timely and accurate ingestion from multiple sources Design reusable macros, simplify processes, and maintain clean, well-documented datasets Support deployment processes, monitor data quality, and manage multi-environment batch operations Required skills & experience Strong hands-on experience with Alteryx and SQL (T-SQL) Experience with relational databases and data preparation Version Control knowledge (SVN/GIT) Fluent in English Dutch or French 4-5 years of relevant experience in data engineering Agile mindset, strong analytical skills, and proactive communication SAS, Python, Tableau, CI/CD practices Experience in banking or financial services Master's in Computer Science, Business, or equivalent experienc