GREG  ROZENTAL

 

Brookline, MA  02445

email: Grozental2@yahoo.com

 

 

 

SUMMARY:    

10 + years of full software development life cycle experience as an individual contributor, technical lead and architect using Java/J2EE, C/C++, LAMP and other programming languages/frameworks on multiple Unix and Windows platforms and doing data modeling, design  and performance optimization for scalable database driven web applications and data warehouses.

 

SOFTWARE:

 

·         Multiple UNIX versions: HP/UX, AIX, IRIX, Linux, Solaris; Windows Vista/XP/2000/NT

·         Java/J2EE (servlets, JDBC, JSP, EJB,  JNDI, JMS, JSF), C/C++, UML and design patterns, PHP, Perl/CGI

·         XML/XSLT, JSON, DHTML (JavaScript, CSS), SQL, Tcl/Tk, Unix shell scripting (Bourne, Korn, C)

·         SQL RDBMS: PostgreSQL, MySQL, Oracle, Sybase , Informix, MS SQL Server

·         Apache Cassandra NoSQL database, DataStax Enterprise

·         Ajax frameworks: Google Web Toolkit(GWT), jQuery, Backbone.js

·         Java open source f rameworks: Spring (MVC, Web Flow, Acegi Security), SiteMesh, Struts/Tiles,  JSF(MyFaces), Hibernate, iBatis, Jakarta Commons, Velocity, Log4j,  LAMP-based platforms                           

·         Application servers/containers: WebSphere, Weblogic, JBoss, JRun, Apache Tomcat 

·         IDE/modeling:  Eclipse, IBM RAD ( and other Rational tools), WSAD, JDeveloper, JBuilder,  Together/J

·         Source control systems: ClearCase, Subversion, CVS, Git etc.

·         Continuous  integration  and build automation tools:  Hudson/Jenkins, CruiseControl, Maven, Apache Ant

·         Unit testing and test automation frameworks: Mockito, JUnit, JMock, Selenium

·         JasperReports, JasperServer, JasperETL, Cognos, Crystal Reports, ERwin Data Modeler, Toad

·         JSON-RPC, TCP/IP, FTP, HTTP, SMTP, SCP/SSH,   RESTful Web Services

 

EXPERIENCE:

 

  Leading provider of learning solutions,    Boston, MA      Architect/Senior Developer     2012 – present

 

  Product suite: online E-learning platform integrated with distributed global systems.

 

The platform consists of a number of individual components connected through RESTful Web Services.

Server-side functionality is implemented using Spring framework an it’s multiple modules ( Spring MVC etc.).

Document store is implemented using Apache Cassandra NoSQL database. Presentation layer is implemented using JavaScript (jQuery, Backbone etc.), HTML5 and CSS3. It supports multiple browsers and client devices: desktops,

tablets (iPad, Android) etc.

 

Work as a senior team member on the self-organizing and self-led agile Scrum team using JIRA, GreenHopper etc.

Development process involves continuous  integration  using  Jenkins integration server, build/test automation using Maven and test-driven development(TDD)  using Mockito and  JUnit frameworks.

 

 

·         Perform NoSQL data modeling for the Cassandra database, adding and modifying Column Families

·         Implement comparators, indexing, manage objects and data in Cassandra using CQL (Cassandra Query   Language) and CLI (Command Line Interface).

·         Implement data persistence layer functionality using Java-based Cassandra API (Thirft/Hector).

·         Design and implement reporting/usage statistics subsystem against Cassandra data store using JasperServer BI suite with Cassandra connector.

·         Design and build new  product features  across all application layers: client-based UI (jQuery, Backbone, CSS, HTML5), server-side Java/Spring, Cassandra data store(CQL, Hector API )etc.

·         Deliver shippable product release at the end of each sprint; keep product ready to be shipped at all times.

 

 

 

Amadeus North America,    Waltham, MA      Architect/Senior Developer     2009 – 2012

 

  Product suite: web-based  reservation/travel management  platform integrated with distributed global systems.

Web desktop is an AJAX application built using Google Web Toolkit(GWT) and integrated via JSON-RPC with Java back-end layer based on the Weblogic application server and Spring framework. System uses MS SQL Server as a repository and operational data store and is integrated with multiple legacy global distributed systems(GDS).

 

Work as a senior team member on the self-organizing and self-led agile Scrum team.

Development process involves continuous  integration  using  Hudson integration server, build/test automation using Maven and Selenium and test-driven development(TDD)  using Mockito and  JUnit frameworks.

 

 

·         Both independently and in collaboration with other team members designed and built new core product features  across all application layers: GWT-based UI, server-side Java, SQL Server stored procedures etc.

·         Investigated performance bottlenecks, proposed and implemented performance optimization   within multiple  application layers and interfaces between the layers.

·         Delivered shippable product release at the end of each sprint; kept product ready to be shipped .

·         Perform   impact analysis for the new user stories/defects in the Scrum backlog and provided estimates.

 

  RealCME Inc.,   Brookline, MA      Architect/Consultant     2008 – 2009

 

·         Designed and  built from scratch  BI(business intelligence)/data mining system  based on the enterprise

       data warehouse integrated with operational data stores.   PostgreSQL database was used for both.

·         Researched  and proposed  the BI infrastructure using open source products including evaluation and recommendation of software tools, definition of hardware requirements, and system configuration. The Jaspersoft BI Suite provides integrated reporting (JasperServer and JasperReports),  analysis (JasperAnalysis) and data integration  tool (JasperETL), as well as  metadata repository based on MySQL.

·       Designed  data architecture,  data flows,   dimensional data models and star schema for the data warehouse.

·         Designed user friendly web-based reporting/OLAP system;  implemented numerous reports and analytical inquiries. The system is portable across open source application servers ( JBoss and Tomcat).

·       Modeled, designed and implemented using JasperETL/Talend  multiple ETL processes  to populate  DW

 

CellExchange Inc., Cambridge, MA      Java/J2EE Technical Lead/Architect      2006 – 2008

 

          Product suite: self-service HR toolkit and career development center implemented as Java/J2EE enterprise

         application using IBM WebSphere Application Server(WAS) and integrated with legacy  data stores

         attached to Enterprise Service Bus  based on IBM WebSphere Process Server (WPS).

 

·         Electronic records retrieval system

 

Development lead/architect for the new comprehensive electronic records search and presentation system .

The system’s domain layer is based on the Spring framework and integrated with release 1.x functionality

using SOA approach.  Presentation layer is being implemented using JSF (JavaServer Faces) integrated with

Spring framework in the domain layer via Manager Bean Facility. JSF-based UI  is seamlessly integrated

with Rel. 1.x Struts-based UI using Struts-Faces and Tiles frameworks.

 

 

·         Career development center

 

         The system is based on SOA with services utilizing J2EE components: EJB container, JNDI, JDBC etc.

         Web-based  UI includes several web applications that utilize services and are implemented using  Struts

         framework,   Tiles, JSPs and JSTL;  Web services used for interface with ESB. Oracle 10g is used as an

         operational data store and PL/SQL stored procedures and triggers are integrated with Java functionality.

 

·         Designed and led development for the core components of the appication: career development planning 

      and  electronic  records interface.  Coded the most complex  modules ( web navigation wizard,   persistence

      framework  for career planner, the whole eRecords viewer including web services and XML parser).

·         Defined and allocated tasks to other developers, UI designer and DBA and integrated their deliverables.

·         Communicated on day-to-day basis with business analysts to finalize requirements, data modeler and DBA

       to refine, modify and make additions to the data model/physical database schema.

·         Under guidance from and in cooperation with the technical architect set design, development

       and unit/integration testing methodologies and coding standards; reviewed code, UI design and data model.

·         Performed impact analysis for the new product features/change requests and provided estimates.

·         Tracked progress and performance for the technical staff of 12 and prepared dev. team status reports.

·         Coordinated product releases between development team, QA team, DBA and systems engineering.

·         Created design notes/specifications and reference manuals for the team, mentored and helped

       team  members, provided directions and advice and troubleshooted  problems on day-to-day basis.

 

 

 

Previous professional experience:

 

        Senior developer/Java technical lead at Shoebuy.com Inc.

 

           Products: family of the specialized e-commerce sites at Shoebuy.com,  implemented as scalable Java-based

             web applications   deployed   on Unix platforms under Apache/Tomcat.

 

Lead developer/architect at Outcome Inc.

 

           Product: Validated and FDA 21-CFR-Part 11compliant clinical systems for major pharmaceutical companies,

                 hospitals and healthcare organizations used  to track patients by various diseases and conditions.

 

·         Led the team junior developers, contractors and QA  to deliver  projects on time and within budget.

·         Integrated  XML, J2EE (JSP, servlets, JDBC, etc.), Open Source components (Struts, Velocity, Log4j, etc.) in the existing Linux platform based on Perl, Oracle (PL/SQL) and DHTML (JavaScript, CSS).

·         Designed  project architecture using UML  modeling  via MagicDraw and use cases.

                                                                                              

·         Re-design of the Genome Data Warehouse and DNA Sequencing Pipeline for Millennium Pharm.

·              Design of the mutual funds data warehouse and data marts for the State Street global funds division.

·         Senior developer for Internet provisioning system at major Internet provider BBN  Planet/Genuity

 

 

EDUCATION: Lvov Polytechnic Institute, Lvov, Ukraine, M.S.

PERSONAL:   U.S. Citizen;   passed National Agency Check for public trust position and other background checks