Erekle is available for hire

Erekle Mamulashvili

Verified Expert in Engineering

Software Developer

Tbilisi, Georgia

Toptal member since June 18, 2020

Expertise

SQL Oracle Development Tableau Development ETL PostgreSQL BigQuery MongoDB Redis MySQL Linux Windows Development

Bio

Erekle is a database expert with 17+ years of experience in Oracle, SQL Server, MySQL, PostgreSQL, Redis, MongoDB, and more. He specializes in large-scale, clustered systems in the telecom and finance sectors. Erekle is experienced in performance tuning, backup/restore, and active/standby strategies for high availability, strong in PL/SQL and T-SQL, complex procedures, and ETL pipelines, and skilled in data visualization and reporting using Tableau.

Portfolio

ZipGO

Tableau, Pentaho Data Integration (Kettle), PostgreSQL, Redshift

Magticom

PL/SQL, Oracle

Experience

SQL - 17 years
PL/SQL - 14 years
T-SQL (Transact-SQL) - 12 years
Oracle RAC - 8 years
MySQL - 5 years
Tableau - 4 years
Pentaho Data Integration (Kettle) - 3 years
PostgreSQL - 3 years

Availability

Full-time

Preferred Environment

PL/SQL, Linux

The most amazing...

...thing I’ve done was install a large-scale Oracle cluster DB and implementing a robust active/standby architecture for high availability.

Work Experience

ETL and Tableau Developer

2017 - PRESENT

ZipGO

Created the ETL process.
Built reports using Tableau.

Technologies: Tableau, Pentaho Data Integration (Kettle), PostgreSQL, Redshift

Senior DBA

2007 - PRESENT

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.

Technologies: PL/SQL, Oracle

Experience

mymagti.com

Subscriber portal for mobile and internet.

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

The data warehouse is running on Redshift database and there are various sources including different relational databases, NoSQL databases, CSV files, Google spreadsheets, and different API’s.

ETL is done with Pentaho Data Integration.

Data visualization tool is Tableau, which has various dashboards.

Education

2003 - 2007

Bachelor's Degree in Applied Mathematics and Computer Sciences

Tbilisi State University - Tbilisi, Georgia

Certifications

APRIL 2020 - OCTOBER 2021

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, T-SQL (Transact-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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