Since February, 2021 I have been working as self-employed as DBA Oracle, MySQL, Cassandra and MongoDB. My experience with these technologies are: Cassandra 3 years, MongoDB 2 years, MySQL 4 years and Oracle 12 years.

I had been worked at Itaú-Unibanco for 5 years focus on Oracle Database. During this period, I improved my abilities with MySQL, Sybase and Cassandra NoSQL databases.  Backup and Restore: to disaster/recover, experience in scenarios using RMAN tool through restore/recover database, TSPTIR, Duplicate and Active Duplicate, Clone database and implementation of Flashback feature too.  High Availability solutions using: Oracle RAC (10g/11g/12c), OR

 Performance analyzes with focus on troubleshooting in SQL and PL/SQL with poor performance on production environment. The tools used for analyze and solution are AWR, Oracle Traces, Oracle Wait Events, Oracle COE, SQL Patches + SPB + SQL Profiles, rewrite of SQLs and PL/SQL ;  HA solutions: migrated production environments that had HA architecture based on IBM solutions for Oracle Dataguard, and Oracle RAC + Dataguard. All migrations in Oracle