Senior BI Developer

• Architect, design, develop, and maintain enterprise-level Power BI reports and datasets
• Build and govern advanced data models (star schema, dimensional modelling, enterprise structures)
• Optimise datasets, composite models, and DAX performance for scalability

Fabric & Data Engineering

• Lead ETL/ELT design within Microsoft Fabric Lakehouse architecture
• Develop and orchestrate data pipelines across ingestion, transformation, and modelling layers
• Optimise and monitor data workflows using Data Lakes and Logic Apps

Advanced SQL, Python & PySpark

• Write and maintain complex T-SQL queries, stored procedures, and optimised database logic
• Use Python and PySpark for distributed data processing and large-scale transformation within Fabric and cloud BI pipelines

Quality, Governance & Testing

• Ensure data accuracy, quality, and adherence to BI governance standards
• Conduct and oversee unit testing, troubleshooting, and code reviews

Core Duties

• Provide proactive 2nd/3rd line BI support
• Troubleshoot and resolve complex BI issues
• Support national and international project delivery and rollouts

• Expert-level Power BI (DAX, data modelling, composite models, dataset optimisation)
• Strong experience designing enterprise-scale BI solutions
• Deep knowledge of Microsoft Fabric (Lakehouse, pipelines, notebooks)
• Strong understanding of Data Lakes and Logic Apps
• Advanced metadata-driven ETL/ELT pipeline development
• Strong Python and PySpark capabilities
• Advanced T-SQL and SQL performance optimisation
• Experience with Azure DevOps (Boards, Repos, Deployment Pipelines)

Desirable skills

• Experience with SSIS and SSAS Tabular
• ERP data experience (Infor M3 desirable, SAP beneficial)

Luton, Bedfordshire, England - £50k - 75k per year Full Time Posted by: Proactive Appointments Posted: Wednesday, 18 March 2026, Proactive Appointments Limited operates as an employment agency and employment business and is an equal opportunities organisation