Database design, Back-end development, Front-end Development (UI/UX)
I have successfully built :
https://www.inunite.com - I was the sole web developer. It an integration of a social network and marketplace. My responsibility was to build a secure web system.
http://www.createyourplans.com - The aim of the project is to bring travelers together, unite them on a single platform where they can search other travelers and be a part of the journey.