Erekle Mamulashvili
Verified Expert in Engineering
Software Developer
Tbilisi, Georgia
Toptal member since November 14, 2017
Erekle is a senior Oracle database administrator (DBA) and database architect with 19 years of experience, including over 13 years on Oracle Exadata (since 2012). He is an expert in RAC, Data Guard, ASM, RMAN, and performance tuning for environments exceeding 100TB. Erekle is experienced with PostgreSQL, SQL Server, MongoDB, Redis, AWS, GCP, and OCI. He is also skilled in PL/SQL, T-SQL, Python, and ETL pipelines.
Portfolio
Experience
- SQL - 17 years
- PL/SQL - 14 years
- Transact-SQL (T-SQL) - 12 years
- Oracle RAC - 8 years
- MySQL - 5 years
- Tableau - 4 years
- Pentaho Data Integration (Kettle) - 3 years
- PostgreSQL - 3 years
Work Experience
ETL and Tableau Developer
ZipGO
- Created the ETL process.
- Built reports using Tableau.
Senior DBA
Magticom
- Developed the database structure, PL/SQL packages, procedures, functions, triggers, and views for OLTP system.
- Built a logical and physical model for analytical databases and the ETL process to move data from an OLTP database to a warehouse database with necessary transformations.
- Installed and maintained databases including administration of the database in addition to performance monitoring and tuning.
- Created strategy for backup copies of data using RMAN, and created a physical standby database, which works parallel to primary and can be switched anytime within seconds.
- Migrated two Oracle databases, version 9 and 10 to Oracle Exadata 11g, from 11g to 12c.
Project History
mymagti.com
Users can control their mobile, internet, or TV service; pay subscription fees; or create automatic balance refilling.
I developed the database structure and database logic side.
Zipgo DWH & Reporting Framework
ETL is done with Pentaho Data Integration.
Data visualization tool is Tableau, which has various dashboards.
Education
Bachelor's Degree in Applied Mathematics and Computer Sciences
Tbilisi State University - Tbilisi, Georgia
Certifications
Oracle Autonomous Database Cloud 2019 Certified Specialist
Oracle
Skills
Tools
Tableau, Oracle RAC, BigQuery, Pentaho Data Integration (Kettle), Oracle OEM 13c
Languages
SQL, Stored Procedure, Transact-SQL (T-SQL)
Paradigms
ETL
Platforms
Pentaho, Oracle, Linux, Windows
Storage
PL/SQL Developer, Oracle 12c, Oracle PL/SQL, PL/SQL, SQL Stored Procedures, Database Administration (DBA), Relational Databases, Redshift, PostgreSQL, MongoDB, Redis, Microsoft SQL Server, MySQL
Other
PL/SQL Tuning, Google Data Studio, Google BigQuery
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