YOKHAN DUKHIN

Moscow, Russia

phone: +1 (408) 520-9419

email: johanduhin@gmail.com

skype: johand84

facebook: https://www.facebook.com/profile.php?id=100006489680285

 

SR. DATABASE DEVELOPER

H1B visa sponsorship required

 

SUMMARY

·         More than 7 years of experience in the Microsoft SQL Server platform

·         Excellent knowledge of data warehousing, OLAP, OLTP, star/snowflake data models, normalization, denormalization

·         Large experience in working with large volume databases (both SQL and SSAS) which contain terabytes of data

·         Expert in writing TSQL, creating tables, views, indexes, complex stored procedures, functions, CLR functions, triggers, assemblies, etc.

·         Solid experience in working with OLTP databases with thousands transactions every minute

·         Excellent knowledge of optimization SQL and MDX queries

·         Good experience in resolving deadlock and blocking issues

·         Expert experience in implementing end-to-end BI solutions using the Microsoft BI stack: MS SQL Server, Analysis Services, Integration Services, Reporting Services

·         Proficient in developing of SSAS databases: cubes, dimensions, roles, calculated members, sets, partitions, aggregations, scopes

·         Huge experience of ETL process using SSIS (including complex C# script tasks) , some experience in Relational Junction and Jitterbit

·         Good knowledge in DBA's aria: backups, restores, monitoring, partitioning, indexes, shrinks, jobs, alerts, etc.

·         Excellence in creating SSRS and Excel services reports using SQL and MDX queries

·         Gathering requirements and transform business needs into technical solutions

·         Good experience in software development using .NET (C#) and C++

·         Excellent team member, workaholic, fast learner, focused on meeting deadlines

·         Have experience in people management

 

TECHNICAL SKILLS

Databases:                            MS SQL Server 2000-2012, Oracle, Access, Interbase, MySQL

Languages:                            SQL, TSQL, C#, C/C++, VB, Pascal, PL/SQL, Objective C

Tools:              Microsoft Visual Studio 2005-2012, MS SQL Server Management Studio, SQL Server Profiler, Borland C++ Builder, Delphi, Query Analyser, MDX Studio

Source Systems:              TFS (including database projects, subscriptions), VSS, SVN

 

EXPERIENCE

03/2012 – Present, Align Technology, Inc., Moscow, Russia

02/2013 – Present, Senior Business Intelligence Engineer (promoted)

03/2012 – 02/2013, Business Intelligence Engineer

·         Designed and implemented a data warehouse and database models (with both star and snowflake approaches)

·         Created views, queries, functions and stored procedures with a complicated logic (using cte, recursions, cursors, window functions, XMLs, etc.)

·         Implemented end-to-end BI solutions

·         Extracted data from different source systems such as MS SQL DBs, Oracle DBs, Excel files, etc., transformed the data (including C# scripts tasks with complex logic) and loaded into the target databases using SSIS (called ETL process) , Relational Junction and Jitterbit ETL tools

·         Optimized poor performance queries with a deep execution plan analysis

·         Developed complex SSRS and Excel services reports (using both MDX and SQL queries) and deployed them to SharePoint portal, created subscriptions if needed

·         Created CLR functions

·         Created and optimized complex MDX queries

·         Gathered and clarified requirements from customers

·         Translated business needs into analytic and reporting requirements.

·         Decomposed tasks for other team members

·         Worked closely with QA Engineers, proposed and implemented some methods for BI testing

·         Performed ad-hoc requests in short time

·         Experienced with some enterprise systems such as JDE (JD Edwards), MES (Manufacturing execution system), BRM (Billing and revenue management), SalesForce

·         Created and supported documentation

 

01/2010 - 03/2012, MTS Retail, Moscow, Russia

05/2011 - 03/2012, Senior Developer (promoted)

01/2010 - 05/2011, Developer

·         Worked with large volume databases (several TBs, billions rows in some tables) and large SSAS databases (dozens millions of members in some dimensions, hundreds millions of records in partitions)

·         Designed and developed OLTP databases with thousands transactions every minute

·         Designed and implemented OLAP databases for SSAS

·         Developed a lot of SSIS packages, including C# script tasks for working with MS Excel (using Microsoft.Office.Interop.Excel namespace) and some transformation needs.

·         Optimized and created new complicated stored procedures for processing a large size of data from ~2500 points of sale (~1 million operations every day)

·         Solved deadlock and blocking issues

·         Implemented a service broker technology for processing a data (hundreds of messages every minute) between the different servers (using XML formatted messages)

·         Created and maintained a dozens of replications between different servers

·         Developed SSRS reports with complicated structures

·         Gathered requirements, discussed with customers, provided estimates

·         Worked closely with Business Analytics, taught them to use some BI tools and methods

·         Managed the team (4 people), decomposed and distributed the tasks, evangelized and trained for new technologies and methods

·         Worked closely with DBA (backups, restores, partitioning, indexes, shrinks, etc)

·         Used an XPath in stored procedures for working with XMLs

·         Worked with Oracle

·         Created PL/SQL scripts and stored procedures for Oracle DB

·         Used Oracle Data Integrator (ODI) for interaction between Oracle and MS SQL Server databases

·         Interviewed candidates

 

10/2006 - 01/2010, C++ Programmer, Retail, clothes and shoes, Moscow, Russia

·         Created a client-server software (C++ / MS SQL Server) for central office and for point of sale servers (~100 shops throughout the country)

·         Designed and developed OLTP databases, stored procedures, triggers, indexes, etc.

·         Performed all DBA’s tasks: backups, restores, partitioning, indexes, shrinks, monitoring, etc.

·         Created a process for exchange data between central server and point of sale servers

·         Implemented complex stored procedures for discount programs, all discount logic was inside the procedures (thousands rows of code and complicated logic)

·         Created an online (latency ~3 mins) client-server software for VPs (C++ / MS SQL Server) with a lot of data and charts that provided a full information about sales, discounts, revenues, etc.

·         Created a client-server software for points of sale for cashiers using dlls for cash-register machines

·         Worked on a lot of different modules for main software in the office (C++ libraries, MS SQL Server)

·         Implemented some modules using Delphi 7

·         Created personal ad-hoc reports for CEO

·         Worked closely with customers and users

·         Tested all components of software

·         Created and supported documentation for all levels of development

 

EDUCATION & TRAINING

2012 - M50578A: "MDX with Microsoft Analysis Services", Moscow, Russia.

2011 - People management course, Moscow, Russia

2006 - Master's degree in Computer Science, University of Moscow, Russia