Rafael Kawamura
Verified Expert in Engineering
Data Warehousing Developer
Wrocław, Poland
Toptal member since November 1, 2021
Rafael has over six years of experience as a business intelligence developer. Being a quick learner, he has worked in various sectors like the government's legal system, the health insurance industry, financial institutions, apparel, and aviation, using various ETL tools like SQL Server Integration Services, Oracle Data Integration, and Azure Data Factory. He has also worked with database technologies like Teradata, Oracle, Microsoft's SQL Server, and Synapse to build data warehouses.
Portfolio
Experience
- ETL - 6 years
- SQL - 6 years
- Data Warehousing - 6 years
- Business Intelligence (BI) - 6 years
- Dimensional Modeling - 6 years
- Relational Databases - 6 years
- Azure Data Factory (ADF) - 1 year
Availability
Preferred Environment
Azure Data Factory (ADF), Azure, SQL, Azure SQL Databases, Azure Synapse, Oracle Database, Oracle Data Integrator 11g, Oracle Data Integrator 12c, Teradata SQL Assistant, SQL Server Management Studio (SSMS)
The most amazing...
...project I’ve led was the requirement analysis and development of the main data mart for Latin America's biggest court of justice in São Paulo.
Work Experience
Business Intelligence Developer
Ryanair
- Worked on the migration of the company's data warehouse from on-premises to a cloud solution.
- Developed ELT processes to report the pandemic's impact on the company's flights.
- Crafted the improvement of the company's GDPR process.
Senior Business Intelligence Developer
Qintess
- Worked in a multinational apparel company to find a data warehouse solution, building data marts and ETL processes.
- Integrated Google Analytics logs from web channels to the data warehouse.
- Migrated SAS programs used for reporting to Oracle Data Integrator 12c.
Senior Business Intelligence Developer
WTime
- Worked in one of the biggest health insurance companies in São Paulo on its clinical data warehouse.
- Defined KPIs along with doctors and developed extractions to improve report accuracy.
- Improved the primary customer classification process inside the company.
Business Intelligence Analyst
CDS
- Led the requirement analysis and developed the main data mart for the Court of Justice of São Paulo and was a source for the KPIs sent to the federal institution responsible for supervising each state's performance.
- Migrated the data warehouse built with Oracle's solution to Microsoft's environment for the Court of Justice of São Paulo.
- Integrated the leasing data for a financial institution in São Paulo.
Experience
Court of Justice of São Paulo Data Mart
Cancellation Data Mart for Airline Company
Online Sales for Apparel Company
Migration of SAS Programs to Oracle Data Integrator 12c
Education
Bachelor's Degree in Systems Analysis and Development
Instituto Federal de São Paulo - São Paulo, Brazil
Skills
Tools
Azure Logic Apps, Microsoft Excel, Teradata SQL Assistant, Microsoft Power BI
Languages
SQL, SQL DML, SQL DDL, T-SQL (Transact-SQL)
Paradigms
ETL, Dimensional Modeling, Business Intelligence (BI), Database Design
Platforms
Azure Synapse, Oracle Database, Oracle Data Integrator 11g, Oracle Data Integrator 12c, Azure
Storage
Azure SQL Databases, Relational Databases, Microsoft SQL Server, PL/SQL, PL/SQL Developer, SQL Server Management Studio (SSMS), SQL Server Integration Services (SSIS), Microsoft Parallel Data Warehouse (PDW), Teradata Databases, Database Architecture, Teradata, SAS SQL, Database Management
Other
Azure Data Factory (ADF), Data Warehousing, Data Modeling, Data Architecture, Data Analytics, Business Intelligence (BI) Platforms, Business Intelligence Architecture, Architecture, Excel 365, Blob Storage, Data Analysis, Data-driven Dashboards
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