Alexsander Silveira

Built and maintained robust dbt pipelines on Snowflake with CI/CD integration, and embedded LLMs in real-time pipelines to improve segmentation accuracy. Migrated critical workloads to Spark, improving efficiency by 25%, and developed analytics layers for marketing and sales teams using Power BI. Implemented orchestration logic using Airflow and GitHub Actions.

Optimized SQL workloads, reducing compute costs by 20%, and created forecasting models to predict supply chain delays, resulting in a 12% reduction in penalties. Migrated legacy ETLs to Azure Data Flows and AB Initio, and integrated Databricks with SAP HANA for faster analytics, achieving a 40% gain.

Delivered end-to-end pipelines using Azure Data Factory and Databricks Lakehouse, and refactored Excel-based workflows to Spark/Parquet with dbt integration. Identified R$80K in cost leakage using Python scripts and created Power BI dashboards consumed by executives and operations.

Built SLA monitoring in Power BI, reducing SLA breaches by 25%, and automated transformation logic using Python and SSIS. Designed and implemented Medallion Architecture in Databricks, and migrated datasets to GCP, utilizing BigQuery, Dataflow, and Data Studio.

Engineered pipelines in Databricks to power WMS dashboards and developed predictive models for inventory optimization, reducing overstock by 12%. Created automated ETLs with Pentaho and Python, and maintained SQL Server and ClickHouse for operational reporting.

Created and maintained dashboards in Power BI and Tableau, and automated routine data flows with Python. Managed datasets and supported ClickHouse migration efforts.

Completed a postgraduate program focusing on advanced data science concepts and methodologies. Gained expertise in statistical modeling, machine learning algorithms, and data-driven decision-making.

Studied core principles of software development, including programming languages, data structures, and algorithms. Developed skills in designing, building, and maintaining robust software systems.

Acquired specialized knowledge in logistics operations and supply chain management. Focused on optimizing processes, managing inventory, and ensuring efficient distribution.