Web app that combines features from Facebook and Instagram.
Found solutions how to make live video streaming with minimum hardware and expenses.
Used MERN stack and sockets.io for real time communications, redux for state management.
I was the only tech person in a group of 4 people.

Reception Web app to register and check out camping guests

Created the pilot sytem for the National Insurance Agency of Greece for validation and verification of medical prescriptions so they could spot incosistencies and possible fraud in the national proscription system

Created a multilingual presentation site of a cryptocurrency

Mobile app that allows users to enter, lock/unlock their properties, monitor/manage remotely house appliances etc

Customize Exus debt collection platform for CIB Bank. Took part in UAT and SIT