Position Overview

We are looking for a Senior Power BI Developer with strong expertise in Power BI semantic modeling, complex DAX, performance optimization, and modern Microsoft Fabric data architectures. The idóneo candidate will be responsible for designing, developing, and optimizing complex Power BI solutions, with a strong focus on report performance, semantic model design, and integration with backend Lakehouse architectures.
This role requires someone who can diagnose and resolve performance issues in existing Power BI reports, redesign semantic models when necessary, and collaborate closely with Data Engineering teams to optimize backend Gold Lakehouse models. The position will involve working with a U.S.-based client, so fluent English is mandatory.

Key Responsibilities

Design, develop, and maintain complex Power BI reports and dashboards using advanced DAX and data modeling techniques.
Build and optimize Power BI Semantic Models using Import, DirectQuery, and Direct Lake modes.
Develop complex DAX measures, calculations,



and business logic while ensuring maintainability and performance.
Analyze and troubleshoot slow-running Power BI reports and identify root causes across the semantic model, DAX, queries, and backend data layer.
Perform Power BI performance tuning and optimization, including model design, DAX optimization, query performance, and data reduction strategies.
Redesign semantic models and Power BI architectures to improve report responsiveness, scalability, and overall user experience.
Work closely with Data Engineering teams to understand and optimize backend Lakehouse models, particularly Gold-layer models.
Identify opportunities to improve the underlying Gold Lakehouse structures when backend data models are contributing to Power BI performance issues.
Support migration initiatives from legacy SSRS reporting solutions to Power BI.
Support migration from Tableau to Power BI, including translating existing reporting requirements and business

📌 Power BI Senior Developer (Argentina)
🏢 GyanSys
📍 Argentina