Vitaly Z.
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Vitaly Z.

Java Solution Architect and team leader


Kiev, Ukraine


Experience: System Architect and Technical Lead with more then 10 years experience including more than 6 years of system architect experience. Extensive experience building scalable, fault tolerant distributed systems that deal with large data volumes, n-tier, client/server, cluster architectures, web applications 4+ years experience developing full text search and other information retrieval systems. Knowledge and experience with of AI, IR and machine learning algorithms. Experience with full text search and IR algorithms and software, NLP and Symantec Web technologies: Solr, Lucene, GSA, RDF, SPARQL. 7+ years experience 3-tier Java design and development (J2EE/EJB, JDBC, applets, HTML /JavaScript / JSP / Servlets / Struts, Hibernate, ... moreXDoclet, Log4J). Developing large-scale multi-tier applications using EJB, XML/XSL technologies and WebLogic, JBoss application servers. Extensive experience with n-tier, client/server, cluster architectures, web applications design and development in Java/J2EE, C/C++, .NET, Visual Basic, SQL. Experienced in Unified Software Development Process, Extreme programming, Agile, Patterns, Metrics and other programming techniques. In-depth knowledge of Windows and Linux/Unix development environments. Previous experience of working on-site in Western Europe and USA. 5 years experience working with SQL: SQL Server, Oracle, MySQL, PostgreSQL 3+ years experience using C/C++ to develop ERP/GIS applications requiring complex mathematical calculations and simulations Interest: AI, IR, distributed computing Specialties:Information Retrieval, Distributed Computing, Computational Logic less

Vitaly Z. has added 4 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Jun 2013 - Jan 2014

    Tomcat performance tuning

    No feedback given

    30 hours
    $21.11 / hr
    $633.30 earned

  • Sep 2013

    Create a secured SSL connection to Solr server with SolrJ library
    We had an urgent ssl connection request with our solr server, on Saturday night. As most of you know, dealing with ssl connections is not an easy task. Vitaly, worked on Sunday morning to solve our problem and did it perfectly. All of this in less time then we though it will take.
    2 hours
    $36.00 / hr
    $83.00 earned

  • Oct 2012 - May 2013

    Rockstar Java Developer
    all i can say is quality and skillful.... Vitaly is definitely one person you want to keep on your team. I look forward to working with him again in the future... THANK YOU!!!
    453 hours
    $15.56 / hr
    $7,040.39 earned

Vitaly Z. has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
Enterprise Java Beans (EJB) 2.0 Test 4.40 Top 10% 7 mins
JDBC 2.1 Test 4.25 Top 10% 10 mins
Java Test 4.25 Top 10% 12 mins

Work History

100% Job Success
2,021 hours worked
12 jobs


Less than 30 hrs/week

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