Senior Analytics Developer / Senior Data Modeler

About the Position

For our client, a leading global provider of end-to-end software and cloud technology solutions, we are looking for an experienced hands-on Senior Analytics Developer / Senior Data Modeler with a strong background in dimensional data modeling and analytics solution design. This role is ideal for someone who enjoys designing scalable analytical models and delivering business-ready reporting solutions. This is a hands-on delivery role focused on data modeling, semantic modeling, and analytics development. It is not a data engineering, pipeline development, team leadership, or advisory position.

This is a full-time remote contract role. We preferably seek candidates based in Serbia or Poland, while also considering candidates across the EMEA region.

Responsibilities

• Design, develop, and maintain dimensional data models, semantic models, and analytical datasets (facts and dimensions)
• Translate business requirements into scalable and high-performing analytical data models
• Develop and optimize Power BI dashboards, paginated reports, Apps, KPIs, and complex DAX calculations
• Design robust semantic models that enable self-service analytics and trusted reporting
• Collaborate closely with Data Engineers to ensure data models are built on reliable and efficient data pipelines
• Monitor and continuously improve data quality, model performance, and reporting reliability
• Implement and maintain data governance, security concepts, and Row-Level Security (RLS)
• Create and maintain technical documentation, modeling standards, and best practices
• Act as the technical point of contact for data modeling, semantic layer design, and visualization implementation
• Share knowledge and collaborate with global Data & Analytics teams and cross-functional stakeholders
• Work effectively in an international environment, appreciating cultural diversity and global collaboration

Requirements

• Bachelor's degree in Computer Science, Information Systems, Data Analytics, or a related field
• Several years of experience as a Senior Analytics Developer or Senior Data Modeler
• Proven expertise in dimensional data modeling (Kimball methodology, Star Schema, Snowflake Schema)
• Proven track record building complex, enterprise-grade dimensional/multidimensional models (not just report-level data models)
• Strong hands-on experience designing enterprise-scale semantic models and analytical datasets.
• Advanced knowledge of Power BI, including semantic models, DAX, paginated reports, dashboards, and Apps
• Excellent SQL skills and experience working with enterprise data warehouses
• Solid understanding of analytics architecture, data governance, and data quality principles
• Experience working with business stakeholders to translate requirements into scalable analytics solutions
• Strong analytical thinking, communication, and stakeholder management skills
• Experience working in global, multicultural teams and able to drive and deliver work independently, with minimal guidance and supervision
• Fluent English; German is an advantage

We Offer

• Start Date: Ideally available to start immediately
• Workload: 100% (full-time)
• Working Model: Remote/Hybrid
• Duration: Long-term project with option to extend

About the Company

Callista is a partner-managed IT company headquartered in Switzerland that specializes in providing experts, dynamic teams, and managed capacity solutions for consulting, engineering, and operational services.

We combine the proximity and quality of a Swiss partner with the scalability of our nearshore center in Serbia. This model offers you maximum flexibility – cost-effective, reliable, and future-proof. With a strong network that extends from Switzerland to Germany and the Balkan region, as well as our deep technological and methodological expertise, we strike the perfect balance between local presence and international efficiency.