Изображение профиля AndreyBarykin
На сайте с 16 сентября 2017 г.
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В сети Офлайн
Database Specialist: developer, architect, dba. Experience: 12 years. Main skills: Database Design, Database Development, SQL-Query Optimization, performance tunning and troubleshooting, consultation about DB properties. I can configure the import of data from various sources by means of the DBMS. I have big experience in SQL-Query Optimization, database development, database design. Know well SQL, make queries of any complexity. I can write stored procedurs, functions, triggers. I can independently conduct an audit of problem areas of performance. DBMS: MS SQL, MySQL, PostgreSQL, Firebird. programming language: Delphi, PHP, a little Python. I can read code, make small tasks. Also I can make some DBA functions: check server performance settings, backups(only in MSSQL), server\database ddl triggers(only in MSSQL). Additionally: XMl, HTML, know DB structure of cms PrestaShop.
$14 USD/hr
5 отзыва(-ов)
  • 100%Выполненные работы
  • 100%В рамках бюджета
  • 100%Своевременность
  • 50%Рейтинг повторного найма


Последние отзывы

  • изображение Vlad K. PostgreSQL Daabase Schema €137.00 EUR

    “Andrey is an excellent database specialist.”

  • изображение John C. Ms Sql table relationship advice $75.00 USD

    “Andrey was very efficient and professional. His work was of the highest calibre and the project was completed far quicker than I had estimated. I would definitely recommend and will use his services again and again as required”

  • изображение John C. DBA to review database performance $111.00 USD

    “Andrey did everything I asked within the timeframe we agreed. I would have no hesitation on hiring him again, and probably will very soon”

  • изображение Vignesh K. SQL Developer for high transaction database $50.00 USD

    “It's great to work with him!”

  • изображение ByteSols LLC. FIX mysql 1 query ORDER BY ISSUE $12.00 USD

    “True freelancer. He has done the good work. In the very short time. Very recommand”

Опыт работы

Senior Database Developer

Feb 2013

Work with Deplhi, MS SQL server, PHP, PostgreSQL, a little Python. Make some services and applications for automatisation, reports from DB, query optimization. Since 2014 main database developer: query optimization, performance tunning and troubleshooting. Since 2015 also make some DBA functions: backups, MS SQL tune-up for best performance, optimization of DB schema, recomendations about queries for other developers.

Senior Delphi Developer

Dec 2011 - Dec 2012 (1 year)

Work with Deplhi and MS SQL server. Develop workflow system, make DB data center for one client, query optimization for best performance of DB data center.

Delphi Developer

Sep 2009 - Dec 2011 (2 years)

Work with Deplhi and MS SQL server. Develop workflow system, make some reports, optimize and refactor report system.

Database Developer

Sep 2007 - Aug 2009 (1 year)

Work with Deplhi and MS SQL server. Develop modules of corporate ERP system.

Database Developer

Sep 2006 - Sep 2007 (1 year)

Work with Deplhi and Firebird. Make some services for automatisation, reports from DB, rework DB.



2001 - 2006 (5 years)


  • SQL Level 1
  • SQL Server 1


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