Rafael Quintana Email and Phone Number

• Developed and provided code maintenance for keeping almost 6,000 data sources working under strict SLA.• Wrote Java client applications to obtain data from sources like FTP, HTTP, e-mail and SOAP in formats like JSON, XML, HTML, Excel sheets and delimited text files to load them into relational databases (Oracle and SQL Server).• Wrote SQL code (PL/SQL and T-SQL) to create the views used by client applications and BI tools to retrieve data.• Participated in technical meetings with clients to gather requirements for integrations with several California ISO applications (SOAP APIs which provide electrical energy data).• Assisted co-workers with code review and the application support team with complex troubleshooting.

• Wrote back-end applications, especially ETL for a medium-size amount of mobile’s telecommunication configuration and performance data.• Designed and implemented the back-end migration of telecommunication systems from RDBMS (MySQL) to NoSQL database (Cassandra and Hadoop/HBase), improving functionalities and performance while reducing costs with cloud servers.

• Planned the State periodical tax supervision accordingly to taxpayers’ risk profile.• Performed exploratory data analysis over huge datasets, which includes invoices of goods sold and taxes statements of every company in Office’s register.• Performed cross database checks over taxpayers’ data to find traces of fiscal evasion and frauds using MS SQL Server and Oracle databases.• Lead technical projects to provide data access for business analysis.• Examined accounting systems and internal controls of organizations, some of them with thousands of millions of items.• Audited accounting records to determine income, exemptions, payable taxes, compliance with reporting regulations and the existence of fraud.

• Supervised the ordering and expenditures with spare parts, fuel, food and other supplies to support a warship’s operations and its crew using the Brazilian Navy ERP.• Coordinated the budget process, analyzed and corrected estimates.• Planned, administered and controlled budgets for contracts, equipment, supplies and payroll.• Assessed legal requirements and specifications for the acquisition of equipment, materials, and supplies.