Tools used : Nginx, NodeJS, ReactJS, Material UI, PostgreSQL, RabbitMQ, ElectronJS and AWS EC2 instance servers.

Sample of the websites I created between 2000-2010. Most of them are now obsolete. Utilized tools: PHP/MySQL, ASP/MSSQL, Adobe Photoshop, Adobe Illustrator

Super-Fast FHD/4k video encoder using C++ under Linux/Windows that can achieve more than x12 in FHD and x16 in 4k resolution speedups, in comparison with the original JCT-VC HEVC Encoder and more than x100 speedup for the sequential JCT-VC HEVC Encoder using the Full Motion Estimation. The encoding scheme uses multi CPUs for the general encoding and GPUs with Nvidia’s CUDA and OpenCL for the Motion Estimation itself.
The latest version 3.60 includes:
• Wavefront and Tiles (WTP) parallel encoding schemes as a unit
• Sophisticated thread scheduling
• Multi GPUs for the fast motion estimation (ME) calculations using OpenCL 3 / CUDA
• A novel fast motion estimation (4PhaseFME) executed entirely inside the GPU kernels using a special version of C language.
• Fraction Execution Resolver
It’s a graphical timeline editor to help you create and prototype animations. It is useful for adjusting variables and checking out how the effects change over time with keyframing and easing/twining functions. It may also have some similarities with the timeline component of adobe flash, after effects, edge animate, or other animation software. Language used C++
OpenSource : https://github.com/sdancer75/qTimeLineEditor
Dynamic forms creator for the Hellenic Ministry of Education Department of Electronics and Network Systems. It serves more than 1.5M users. It supports three types of authentication a) OAuth2 for the Organisation and structure of the General Secretariat for Information Systems b) SAML2 for the Greek School Network (www.sch.gr) is the national network of the Ministry of Education and Religious Affairs which safely interconnects 15.973 schools and c) local Admins
Tools used for the frontend
for the Backend
https://formes.minedu.gov.gr/#/homepage
A media content delivery system written with C++/MFC/SQLite
It supports Audio/Video/DHTML/3D content. It has its own content compiler and a versatile online/offline activation/deactivation system (SoftLock).
The latest version includes:
Free download
http://www.paradoxinteractive.gr/portfolio-item/gnosis-explorer/
Free Book
https://www.paradoxinteractive.gr/download/samplebook/

A Mobile app with React Native. A citizen engagement platform that bridges the gap between citizens and their local authorities. We transform the delivery of public services making them more efficient, participatory, transparent, and inclusive.




Simple offline reverse geolocation using CSV files. Written javascript.
Database
https://download.geonames.org/export/dump/

Call the library with the desired latitude and longitude
reverseGeoLoc(40.10753, 22.48228, callback)

Download the source code from https://github.com/sdancer75/OffLine-ReverseGeolocation
Online Betting Site, php/javascript/mysql
An online betting site from the old 2009 that is using one of the best AJAX User Interface Libraries (Yahoo’s YUI) at the time. YUI is now discontinued. It is an open-source JavaScript library for building richly interactive web applications using techniques such as Ajax, DHTML, and DOM scripting.
OpenSource : https://github.com/sdancer75/VelvetBet