Senior DAX / Power BI Developer (m/f)

About this role

ARHS Group, part of Accenture, is looking for a Senior DAX / Power BI Developer to join one of our client teams onsite in Luxembourg within a European institutional environment . In this role, you will focus on advanced Power BI and DAX development , combining data from existing IT models with additional data sources and building efficient reporting solutions. THE WORK: Design, develop, and maintain Power BI reports and dashboards .

Develop advanced DAX calculations and data models to support complex reporting requirements. Use DAX table manipulation functions to combine, transform, and manipulate tables from existing IT models together with other data sources. Optimize DAX queries, calculations, and data models for performance and maintainability . Work closely with business and technical stakeholders to translate reporting requirements into effective Power BI solutions.

Troubleshoot data, modelling, and reporting issues and contribute to continuous improvements. Onsite at client site: This role requires an onsite presence with our clients and partners to support project delivery and strengthen collaboration. Our roles require in-person time to encourage collaboration, learning, and relationship-building with clients, colleagues, and communities. As an employer, we will be as flexible as possible to support your specific work/life needs.

HERE’S WHAT YOU’LL NEED: Strong professional experience with Power BI and DAX . Advanced knowledge of DAX table manipulation functions and complex DAX calculations. Strong experience with data modelling and working with multiple data sources. Ability to manipulate and combine data directly using DAX rather than relying primarily on Power Query/M . Good understanding of Power BI performance optimization and reporting best practices.

Strong analytical and problem-solving skills. Fluency in English . BONUS POINTS IF YOU HAVE: Previous or current experience working as a freelancer / independent consultant . As part of our security and compliance procedures, candidates will be required to undergo a criminal background check prior to employment. Arηs Group, Part of Accenture, specializes in the management of complex public sector IT projects, including systems integration, informatics and analytics, solution implementation and program management.