Senior Reporting Developer

Join our journey to create a new experience for the National Lottery and help us to power change for the greater good.

About us:

We are Allwyn UK, part of the Allwyn Entertainment Group - a multi-national lottery operator with a market-leading presence in Austria, the Czech Republic, Greece, Cyprus and Italy. We have been officially awarded the Fourth Licence (10 year licence) to operate the National Lottery starting February 2024. We have developed ground-breaking technologies, built player protection frameworks, and have a proven track record of making lotteries better.

Our aim is to create one of the UK's most inclusive organisations - where people can bring the best of themselves, to do their best work, every day, for the benefit of good causes. Allwyn is an Equal Opportunity Employer which prides itself in being diverse and inclusive. We do not tolerate discrimination, harassment, or victimisation in the workplace. All employment decisions at Allwyn are based on the business needs, the job requirements, and the individual qualifications.

Allwyn encourages applications from individuals regardless of age, disability (visible or hidden), sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief and marriage and civil partnerships. While the main contribution of the National Lottery to society is through the funds to good causes, at Allwyn we put our purpose and values at the heart of everything we do.

Join us as we embark on a once-in-a-lifetime, large scale transformation journey to build a bigger, better, and safer National Lottery that delivers more money to good causes.

The Senior Reporting Developer (Power BI) is responsible for designing, building, and maintaining high-quality, scalable, and user-friendly analytics solutions using Power BI. This role focuses on tabular model design, data visualization best practices, and end-to-end report lifecycle management—ensuring that business stakeholders receive accurate, insightful, and timely data.

A strong candidate will have deep hands-on experience with Power BI, including Power Query, DAX, tabular modelling, and efficient data transformations. They will be experienced at Power BI capacity planning, optimizing performance, and integrating Power BI solutions with broader data platforms. The Senior Reporting Developer will be creating reports which reflect the business needs and will encourage data-driven decision making across the business.

Proactive proposals of report improvements based on Power BI feasibilities and efficient communication with the business stakeholders are also expected.

• Design, develop, and optimize Power BI dashboards, reports, and data models
• Implement best practices for data transformations (Power Query), DAX calculations, and tabular model design, including unit testing of tabular models to ensure accuracy and reliability
• Create intuitive layouts and visual designs that drive business adoption, focusing on great user experiences (UX) in reports and dashboards
• Maintain consistency in visual standards, data definitions, and nomenclature across all reports

• Build and maintain robust, scalable tabular models that support self-service analytics and enterprise reporting
• Collaborate with data engineering/platform teams to align on data warehouse design, create and maintain aggregate tables, and ensure reliable data pipelines feeding into Power BI from multiple data sources
• Implement data integration best practices to ensure consistent, accurate, and secure data across the reporting ecosystem

• Implement and manage Power BI Work spaces, gateways, and deployment pipelines
• Apply CI/CD practices for reporting artifacts (e.g., version control, automated testing, and release management)
• Identify and implement automation opportunities for processes such as refresh schedules, performance monitoring, and usage analytics
• Contribute to capacity planning and management, ensuring optimal resource utilization and ability to handle growth in data volume and user concurrency