Nikolaos Margaritis, Ph.D.

Experience

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  Hellenic Air Force

  Sept 1998 - Oct 1999

  Meteorologist at Headquarters (ATA), National Service

  • Disseminating current weather information to all military establishments. • Research on computational applications based on meteorological models.

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  National Center for Scientific Research "DEMOKRITOS"

  Dec 1999 - Jan 2002

  Research Fellow (PostDoc)

  (PERMOD Project, EU funded): Molecular simulations of Polymers in glassy phase. For a glassy polymer system the Free Energy may be trapped inside a local minimum. The problem which arises is that the equilibration times are extremely long. As a solution, the technique which was adopted was Coarse Graining. The final aim was to study diffusion and solubility as well as other statical and dynamical physical properties of such systems.

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  Bullet S.A.

  Jan 2002 - Apr 2004

  R&D / Software Engineer

  Design and integration of a prototype Cluster consisting of multiple nodes. Aim: To produce a fast, reliable and cost effective solution based on Linux, for companies and institutions. To improve the speed of code execution via parallelisation techniques (High Performance Computing). To provide an environment of uninterruptible execution for various services (High Availability Computing). Installation, integration and optimised parameterisation of the Oracle 9i RAC Database.• Technologies: Java 4, JSP, JBoss, PostgreSQL, PHP, MySQL.• Communication with customers• CRM application.• Website application design and development. Show less

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  United Online S.A.

  Apr 2004 - Dec 2006

  Software Engineer & Small-Team/Self Management

  • Communication with customers• e-Shops with direct online payment service• Hotel catalogues and directories• Room occupancy & booking system for hotels• Search Engine Optimisation (SEO) using Search Engine Friendly (SEF) path techniques.• Technologies: Java 4, Hibernate, JSP, PHP, Pair, MySQL, TomCat, Apache, Ant

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  Intrasoft International

  Jan 2007 - Jan 2012

  Corrective & Adaptive Maintainance• Support. Continuous communication with the customer. Manage Incident handling.• Manage complicated application environments. • Remote management of human resources.• Writing and or updating technical documents (DMD, SAD, SRS, BUCs, TP, LP, UM, AM).• Team Guidance: Code techniques. Design Patterns. UML.• Responsible for technical & financial part of offers. Effort & time estimations.• Technologies: Java 6 & 5, JEE (EJB3 & EJB2.1), Web Services (SOAP, RESTFUL), iBatis, Informix, Weblogic, Spring (Core, MVC), Ant, Maven, JAXB, JSP, JSTL, POI• COTS: Rational Architect, PowerDesigner, IBM FileNet, Remedy, Jira, MS Project, MS Sharepoint. Show less NCTS (New Computerised Transit System) / MASP.Be (Multi Annual Strategic Plan)Application for the Belgian Customs to provide a systematic handling of the complete volume of transits to and from Belgium.Application development & Design.• DB Table & JPA Entity Structure, following RUP methodology.• Optimised storing large SOAP messages containing NCTS and National Reference Data.• Code Design for various software components & vertical implementation of use cases.• Technologies: JEE (EJB3, JPA, JAXB), C/C++ (reverse engineering), DB2, Weblogic 10.2 Show less EMCS (Excise Movement and Control System) / SEED (System for Exchange of Excise Data)European Data Warehouse for Economic Operators transporting Excise products)Application development. • Regular communication with the customer.• DB Model documentation & Oracle installation scripts• Installation & Configuration of SAP Business Objects platforms• Monthly meetings in Brussels (SAPS) & RFC document maintenance• Technologies: Java 5 & 4, JEE (EJB2.1), Spring, Hibernate, Oracle 9/10, Weblogic 9 & 8, Ant.• COTS: SAP Business Objects, PowerDesigner Show less

  • Senior Technical Consultant

    Nov 2011 - Jan 2012

  • Technical Team Leader

    Jan 2010 - Nov 2011

  • Senior Software Engineer

    Jun 2008 - Dec 2009

  • Senior Software Engineer

    Jan 2007 - May 2008
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  Independent Contractor for Java Applications

  Feb 2012 - Dec 2012

  Application Architect & Developer

  Contractor for Web and Enterprise Applications. Long experience in handling both the web and backend parts. • Programing in Java, Scala and various scripting languages, using cutting edge or legacy libraries depending on the needs. • DB Implementations in Oracle, PostgreSQL, MySQL. • Server OS in Unix/Linux/Windows. • Application Server Glassfish/Tomcat/Weblogic.

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  VoiceWeb SA

  Jan 2013 - Nov 2016

  Senior Software Architect

  Responsible for design and architecture of new SMS platform.

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  European Commission

  Dec 2016 - now

  Technical Consultant

  RINA (Reference Implementation for National Applications), part of the the EESSI Project (Electronic Exchange of Social Security Information).Leading the agile project of migrating the DB schema of RINA from ElasticSearch to SQL (PostgreSQL). The applied DAO pattern was based on Spring Data and JPA (Hibernate).- Technologies: Java, Groovy, Spring, JPA, Hibernate, Angular, Bonita BPM, REST, SOAP, JAX, XML, JSON, XSD, Tomcat, PostgreSQL, ElasticSearch, Docker, Linux