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iO Associates - UK/EU
Power BI developer

Power BI developer

Hybrid

London, United kingdom

£ 615 /day

Freelance

04-11-2025

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Skills

SQL Sales power bi Analytics DAX

Job Specifications

Role: Power BI Developer
Day rate: Inside IR35 up to £615 per day
Location: Remote - onsite occasional would be great
Duration: 3 months with likely extension

Power BI Developer to design, build, and deliver end-to-end BI solutions from SQL and Power Query ETL through data modelling, DAX, and dashboard design. This role is perfect for someone who thrives on transforming complex data into powerful, high-impact insights.

Key Responsibilities:

Develop end-to-end Power BI reports integrating multiple data sources (SQL, Power Query).
Build and optimise data models for performance, scalability, and simplicity.
Create advanced DAX measures for financial, operational, and performance analytics.
Design clean, user-friendly dashboards aligned with brand and reporting standards.
Perform unit testing, troubleshoot data issues, and validate accuracy.
Maintain clear in-line and external documentation throughout the project lifecycle.
Collaborate with stakeholders to support testing, rollout, and adoption of BI solutions.

Technical Skills:

SQL (Intermediate): Joins, CTEs, subqueries, window functions.
Power Query (ETL): Data transformation and automation.
Power BI Data Modelling: Star schema design and performance tuning.
DAX: Advanced measures, KPIs, and calculated columns.
Power BI Visualisation: Skilled in standard Power BI visuals (no third-party tools).
Documentation & QA: Strong focus on testing, accuracy, and maintainability.

Desirables:

Government or public sector experience
Sales and finance data experience

If you fit the above description and are available to start a new role within the next week, please send me your updated CV

About the Company

Specialising in recruitment across the tech, digital, engineering, and government and defence sectors, iO Associates have extensive experience in securing the best talent to create the products and infrastructure of the future. Our dedicated team of highly experienced and knowledgeable consultants provide bespoke solutions, working with businesses to find the perfect fit across contract, interim, search, and permanent appointments. We offer end-to-end support, from Statements of Work and IR35 determination processes to full... Know more