1996-1997
Software Engineer
POLYTROPON Ltd
Thessaloniki, Macedonia, GREECE
Analysis, Design and Development of a multi-platform, client-server information system to assist in all precosting steps for textile design and production.
Analysis and Design were carried out with MacAnalyst CASE tool and development with 4th DIMENSION & AreaList Pro. A beta version of the system was presented
in the 78th International Conference of the Textile Institute in Thessaloniki, May 1997.
1997-1998
Application Developer
METROPOLIS Ltd
Thessaloniki, Macedonia, GREECE
As part of a skilled group co-developed document processing GUI and service applications for banks and clearing houses in Austria, Poland, Hungary, Nigeria,
for the Greek Post company ΕΛΤΑ and the German Post company. Development platform was Delphi, Borland Pascal and BTRIEVE record manager over Novell network.
1999-2004
Solution Provider
KETHI (Research Center for Gender Equality) - Κ.Ε.Θ.Ι
Athens, GREECE
Deployment & Support of ΚΕΤΗΙ's services:
- Windows NT 4.0 File and Web Server
- Linux Mail Server (qmail) and DNS Server (bind)
- Backup and Support of several Windows 98 workstations
Development of KETHI's distributed Incident Tracking information system for Violence against Women:
Developed a custom MsAccess'97 split database architecture information system, over dialup connections interconnecting all KETHI branches,
2 in Athens and 5 in major cities of Greece. The system enabled and synchronized the collection of various types of sensitive data with local
and centralized storage, a user authentication and fine granularity privilege system, various printing options and parametric data exporting
to CSV, TSV and MsExcel'97 formats.
Consulting services on hardware and software purchases.
1998-now
SysAdmin, Developer, DBA
Head of the HDAT Support technical group
Dpt of HDAT Trading Venue, Bank of Greece
Athens, Attica, GREECE
Administration of the Oracle 19c OLTP and Historical databases of the market.
Development of several key applications for Bank of Greece, such as:
- Greek Government Bond Price Estimation (MsExcel'97, VBA, Visual Basic 6, MsAccess'97, SQL-Server-2000)
- Greek Government Treasury Bills (MsAccess-2003)
- Greek Security Organizations Assets (MsAccess-2010)
- Automated Reporting for ESMA-Firds (Java 8, JAXB, XML, SQL-Server-2008, Oracle 19c)
- Departmental level applications (Visual 2013 C#)
Installation, administration and support of a multi-departmental Ms Windows 2019 domain with 40 workstations.
Remote system administration and HDAT Proxy Server software installation on 50 trading members servers.
2019-2021
Research Scientist
Department of Informatics and Telecommunications
National and Kapodistrian University of Athens
Athens, GREECE
Worked on the ExtremeEarth European project which was an H2020 proposal in the area of ICT addressing the call “ICT-12-2018-2020: Big Data technologies
and extreme-scale analytics”. The focus of my work was on co-developing Strabo 2 the first distributed geospatial RDF store able to process massive
geospatial RDF datasets. The development and deployment platform was Hopsworks. The technologies used for Strabo 2 include Apache Hive for the database,
Ontop-Spatial for GeoSPARQL-to-SQL translation, and the distributed in-memory processing framework Apache Spark, extended with Apache Sedona (former GeoSpark)
library for enabling spatial partitioning, indexing and processing.