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Jefferson Romeiro is an experienced Database Administrator currently working at Digio since December 2023. Prior to this role, Jefferson served as a Performance Specialist at Cielo from June 2023 to December 2023 and worked at Telefônica Brasil from August 2018 to June 2023 as an Analista de Capacidade e Performance, focusing on capacity planning, troubleshooting, and performance analysis for databases and applications. Jefferson holds an Oracle Database 12c OCP certification and has extensive experience in performance tuning and capacity planning gained during tenures at Inmetrics, TIVIT, Interfile, and Atos Origin, where responsibilities included data manipulation, performance analysis for Oracle and Microsoft SQL Server, and database administration. Educational qualifications include a Bachelor's degree in Information Systems from EATT, obtained from 2005 to 2008.