Mirko M. Profile

5,0

(4 omtaler)

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$50 USD / time

prague,

czech republic

$50 USD / time

Det er for øyeblikket 4:59 a.m. her

Ble med november 30, 2019

0 Anbefalinger

Mirko M.

@mmarovic

5,0

(4 omtaler)

3,4

100%

$50 USD / time

prague,

czech republic

$50 USD / time

100 %

Jobber fullført

100 %

Innenfor budsjett

100 %

I tide

50 %

Gjenansettelsesrate

Database specialist

I am an experienced database specialist. I designed, administered, developed, and optimized large databases in Telecom, Banks, Health Care, Retail, Inventory Management, and many other areas. I worked on SQL Server, Oracle, PostgreSQL, MySQL, and Informix. My favorite jobs include writing stored procedures, query, and performance optimization that includes index design and database configuration.

Se alle MySQL Developers i Czech Republic

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Portefølje

- Optimized PL/pgSQL and SQL functions and indexes before the EU soccer championship, reducing overall CPU load by 60%.
- Redesigned the indexes on payment-related tables, reducing data reads by 40%.
- Reduced ticket evaluation for big matches (200,000+ tickets) from 40 minutes to less than 2 minutes.

PostgreSQL development and database optimization for STS.pl

FORIS is an OSS/BSS system consisting of billing, rating, provisioning, and resource inventory modules using massive Oracle databases with hundreds of millions of CDR rows loaded each hour. As a database team leader, I was responsible for designing the data model, PL/SQL development, database administration, and performance optimization. The system was successfully deployed, handling trillions of CDR data, inventory of hundreds of millions of cell phones, and other mobile devices and generates monthly invoices for 100 million subscribers.

Oracle: FORIS - OSS/BSS system for MTS, Moscow

Job Seekers portal pages received on average 8,000 hits per second at the time I was working for Monster as a database engineer. I participated in defining and enforcing SQL Server standards and best practices. My tasks included code review, design review, and performance optimization. I was responsible for T-SQL stored procedures code review produced by more than 40 developers located in Prague, Czech Republic, and Maynard, Massachusets, USA.

SQL Server: Portal for Job Seekers

PostgreSQL development and database optimization for STS.pl

Oracle: FORIS - OSS/BSS system for MTS, Moscow

SQL Server: Portal for Job Seekers

Anmeldelser

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5,0

$460,96 USD

Project for Mirko M.

Mirko went above and beyond on this project, he is a great communicator and his work was exactly as requested! I look forward to working with him again. [28 April, 2020] Another milestone met to satisfaction, thanks Mirko! [28 April, 2020] Mirko continues to go above and beyond, looking forward to continuing our work together!

MySQL

Scott S.

@ScottSRGD

•

4 år siden

5,0

$35,63 USD

mySQL Query Help

Mirko may be new to Freelancer, but he is very experienced and a pleasure to work with. He is a great communicator, works quickly, and takes time to understand the goals of your project in order to produce the best result. I used Mirko for a mySQL project and I look forward to working with him again very soon!

PHP

MySQL

Scott S.

@ScottSRGD

•

4 år siden

Erfaring

Crossmasters sro

jan. 2023 - Nå

Design financial data mart for CIMEX, developed ETL using Asure Data Factory.

Betsys

apr. 2019 - des. 2022 (3 år, 8 måneder)

Design, developed and optimized database model, SLQ/plpgsql functions and indexes for sts.pl - the leading online betting platform in Poland.

Self-employed

jun. 2009 - apr. 2019 (9 år, 10 måneder)

Developed MySQL query generation patterns for https://spikeet.com/. Developed SQL Server stored procedures for Faraj Fund, UAE. Developed PostgreSQL functions for TV Nova, Czech Republic. Design database model and developed MySQL queries for 3v3 football tournaments portal, Phoniax, Norway. Design and developed the SQL Server reporting database for Blue Rabbit. Developed Oracle PL/SQL packages of data synchronization between provisioning and billing system for MT:S telecom operator, Serbia.