Robson Bale
Senior Power BI SME / Developer | Inside IR35 | London – 4 Days Onsite
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Senior Power BI SME / Developer | Inside IR35 | London – 4 Days Onsite
📍 London – 4 days per week onsite
📄 Contract – Inside IR35
We’re looking for a highly experienced Power BI SME / Developer to design, develop and support enterprise-scale reporting and semantic modelling solutions within a complex data environment.
This is a technically hands-on role requiring significantly more than dashboard development, with a strong focus on semantic model architecture, advanced DAX, automated refresh, partitioning and performance optimisation.
Key Responsibilities
- Design and develop enterprise Power BI reporting solutions
- Build and optimise large-scale semantic models
- Develop advanced DAX, calculation groups and optimisation techniques
- Implement Incremental Refresh and dataset partitioning
- Optimise large datasets, refresh processes and query performance
- Develop Python automation for semantic model refreshes
- Implement RLS, governance and access controls
- Build CI/CD and deployment automation for Power BI
- Troubleshoot gateway, refresh and performance issues
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Essential Skills
- Expert Power BI Desktop & Power BI Service
- Advanced DAX and semantic modelling
- Strong SQL and dimensional modelling
- VertiPaq, composite models, aggregations and query optimisation
- Incremental Refresh and partitioning
- XMLA, Tabular Editor & DAX Studio
- Strong Python scripting
- PowerShell and Power BI REST APIs
- CI/CD / DevOps
- Power BI Premium and/or Microsoft Fabric
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Desirable
- Financial Services / Risk Reporting
- Snowflake
- Azure Data Platform
- dbt
- Control-M or similar scheduling platforms
Please note: This role requires 4 days per week onsite in London and will operate Inside IR35.
We're looking for a genuine Power BI specialist with deep semantic modelling and performance optimisation expertise, rather than a dashboard/reporting-focused Power BI Developer.
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