B Tamilarasan

Power BI Developer with 5 years of experience in designing and delivering enterprise Business Intelligence solutions using Power BI Desktop, Power BI Service, SQL Server, DAX, and Power Query (M Language). Skilled in data modeling, ETL development, dashboard development, Power BI Report Builder, Row-Level Security (RLS), scheduled refresh, and performance optimization across Azure and SharePoint environments. Proven ability to translate complex business requirements into scalable, high-performing reporting solutions using Power BI Gateway and enterprise data platforms.

Power BI Developer - Comcast India Engineering Center I LLP - Chennai

(2023-07 - 2026-06)

• Gathered and analyzed detailed business requirements from cross-functional stakeholders across finance, operations, and sales teams, translating complex, often ambiguous reporting needs into scalable, high-performing Power BI dashboard solutions reused across departments.
• Designed and developed highly interactive dashboards and KPI-driven reports using Power BI Desktop, incorporating drill-through, bookmarks, and dynamic filtering to enable faster, more informed business decision-making at every level of the organization.
• Wrote and optimized complex SQL Server queries, stored procedures, and views — including CTEs and window functions — significantly improving data retrieval speed and overall report performance for large, high-volume datasets.
• Authored advanced DAX measures, calculated columns, and Time Intelligence calculations to support detailed year-over-year, month-over-month, and trend-based business reporting across finance and operations.
• Performed end-to-end ETL processes using Power Query (M Language), including data extraction, cleansing, transformation, and shaping from multiple heterogeneous source systems for downstream reporting.
• Built robust Star Schema and Snowflake Schema data models with well-optimized Fact and Dimension tables, establishing a scalable semantic layer that supported enterprise reporting across multiple business units.
• Implemented Row-Level Security (RLS) across multiple reports to enforce secure, role-based access to sensitive business data, ensuring users only viewed data relevant to their department or region.
• Performed rigorous data validation, supported User Acceptance Testing (UAT), and managed end-to-end report deployment and production support, ensuring smooth transitions from development to live reporting environments.

BI Analyst - Aaram Developers - Coimbatore

(2021-01 - 2023-05)

• Developed detailed SQL-based reports and Excel dashboards to support business reporting and operational decision-making across sales, finance, and operations teams.
• Prepared interactive dashboards to visualize sales performance, operational activities, and overall business performance trends, giving leadership a consolidated view across the organization.
• Tracked and monitored KPIs across multiple departments, providing regular, accurate performance reporting to business stakeholders and highlighting areas requiring corrective action.
• Performed thorough data validation to ensure the accuracy, consistency, and reliability of business reports before distribution, catching discrepancies before they reached leadership.
• Automated recurring reports and manual processes, significantly reducing turnaround time and improving reporting efficiency for teams that previously relied on manual Excel consolidation.
• Supported User Acceptance Testing (UAT) cycles and incorporated stakeholder feedback into ongoing report enhancements, ensuring final deliverables met business expectations.

Master of Business Administration - MBA - PSNA College of Engineering and Technology (2015-07 - 2017-11)