Sergey Istomin

Minsk, Minsk Region, Belarus

Member since May 27, 2014

Sergey has over 6 years of experience in software design and development. His favorite languages are Java and Groovy. He enjoys developing multithreaded, concurrent, and high-load apps. He has worked on projects related to online betting, eCommerce, and producer-consumer applications.

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Portfolio

Bookmaker "Marathon"
Java, Spring, Apache Click, JDBC, Hibernate, Web Services, Hessian...
Scand
Java, Groovy, Grails, Solr, Spring, Hibernate, XML, XSLT, Liquibase, jUnit...
Scand
J2EE, Groovy, Grails, Spring, Hibernate, Spring MVC, JSF, XML, XSLT...

Experience

Java, 8 years
Spring, 6 years
JDBC, 5 years
Concurrent Programming, 5 years
Hibernate, 5 years
Spring MVC, 4 years
Groovy, 4 years
Grails, 4 years

Availability

Part-time

Preferred Environment

Windows, Linux, IDEA, Eclipse, Git, Mercurial, SVN

The most amazing...

...thing I've coded is a profiling system of the "bad" gamblers in an online betting system.

Employment

Development Lead
Bookmaker "Marathon"
2013 - PRESENT
- Developed a credit system for gamblers in the online betting system.
- Developed an offender profiling system for "bad" gamblers in the online betting system.
- Interviewed, checked, and taught new members of the team.
- Built the development process for the local team.
- Participated in the design of the architecture of different aspects of the application.
Technologies: Java, Spring, Apache Click, JDBC, Hibernate, Web Services, Hessian, JMS (various implementations), jUnit, jQuery, HTML, CSS, JavaScript, AJAX, Velocity, Quartz, Git, SVN, Ant, Ivy, Maven, Tomcat, Oracle
Team Lead
Scand
2011 - 2013
- Supported the full software development cycle by proposing ideas and making decisions.
- Specified requirements for the application. Analyzed and reviewed code, implemented features, and handled design.
- Developed the architecture of the application and managed the team using Scrum methodology for the product and Sprint backlog.
- Designed the architecture and developed the B2B online catalog based on Solr.
- Designed the architecture and developed the printed catalog.
- Designed the architecture and developed the digital asset.
- Created a management system for digital assets like images, PDFs, or files in other formats.
Technologies: Java, Groovy, Grails, Solr, Spring, Hibernate, XML, XSLT, Liquibase, jUnit, jQuery, HTML, CSS, JavaScript, AJAX, Velocity, Web Services, Mercurial, Maven, Tomcat
Software Engineer
Scand
2009 - 2011
- Created an import/export data workflow system.
- Built a customizable business workflow.
- Imported, exported, analyzed, merged, and checked data via XSL or Groovy scripts.
- Developed the product information manager for a large eCommerce solution.
Technologies: J2EE, Groovy, Grails, Spring, Hibernate, Spring MVC, JSF, XML, XSLT, Liquibase, jUnit, Prototype, Dojo, jQuery, HTML, CSS, JavaScript, AJAX, Velocity, Web Services, Mercurial, Maven, Tomcat
Junior Software Engineer
EPAM Systems
2008 - 2009
- Integrated Atlassian Confluence into internal EPAM systems via plug-ins.
Technologies: Java, Struts, Spring (IOC, AOP, Security), JSF, JPA (Toplink, Hibernate), XML, XSL, SQL, Oracle, MySQL, MS SQL, HTML, JavaScript, CSS, AJAX

Experience

Online betting system (Development)
http://marathonbet.com
The most popular online betting system in Eastern Europe.
Catalog with aggregated items (Development)
An online catalog system where users can find items on the internet and post them to the system with bookmarks. Users can also create wish lists and share them with friends.

Skills

Languages
Java, Groovy
Frameworks
Grails, JPA, Spring, Hibernate, Spring MVC, Spring JDBC, Spring Security, JUnit, JavaServer Faces, AngularJS, Apache Struts, Apache Axis, JSF, Apache Velocity
Libraries/APIs
JDBC, VK API, Google API, Quartz, jQuery, jQuery UI, JMX, JMS, JAX-RS, JAXB, Apache POI, MyBatis, JAX-WS
Tools
IntelliJ IDEA, Eclipse IDE, Maven, Ant, Apache Tomcat, Ivy, Apache JMeter, Apache, Eclipse RCP
Platforms
Windows, Oracle, AWS EC2, Linux, Amazon Web Services (AWS)
Storage
JSON, Microsoft SQL Server, H2, MySQL, NoSQL, InnoDB, MyISAM, PostgreSQL, MongoDB, AWS S3
Paradigms
Agile Software Development, Continuous Integration (CI), Concurrent Programming, REST, Unit Testing, Test-driven Development (TDD), Iterative programming, Spiral development, Scrum
Other
Hessian

Education

Bachelor's degree in Computer Science and Artificial Intelligence
Belarusian State University of Informatics and Radioelectronics - Minsk, Belarus
2005 - 2010

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