Responsible for all company databases: SQL - Oracle 11g and 12c, Postgres and NoSQL, Elasticsearch, Redis, and MongoDB. Data import and migration, impdp/expdp, and RMAN. Interaction with development teams for SQL reviewing and tuning. Performance analysis and tuning - AWR Reports. Administration of MySQL databases. Scripts for data integration with other systems. Installation, configuration, and maintenance of Oracle Application Server environment. Server monitoring and identification of tuning opportunities. Application of patches. Documentation of processes and integrations involving the database.

Java Developer II for the company's online sales system. Intermediate knowledge in web systems development for online sales using Java EE, JSF, JPA, and EJB technologies. Development of PL/SQL packages and procedures in Oracle for data extraction and display. Query, report, and materialized view tuning to improve execution and scalability. Development of Android applications for sales transactions. Utilization of version control systems SVN and GIT.

Led the Academic Module as the Tech Lead in the company's commercial ERPDemonstrated expertise in understanding business rules for Academic Systems in Higher Education, encompassing both in-person and distance learning environmentsUtilized advanced knowledge of data modeling for Academic Systems and successfully integrated with accounts receivableDemonstrated proficiency in PL/PGSQL and PL/SQL, as well as JavaEEApplied advanced knowledge of the Moodle platform, covering versions 1.6 to 3.2.1, including functionality and modelingDeveloped pl/pgSQL functions for Academic Systems, integrating with finance, accounting, cash flow, and bank reconciliationExecuted data export to governmental systems such as ENEM, higher education census, and PROUNIDesigned integration between Academic ERP and Moodle using dblink and web servicesCreated triggers, forms, reports, and stored procedures for ERP modules: Academic, EAD, and Financial

Development of dynamic and static pages, with support database. Maintenance and hosting of websites and development of commercial systems for customers.