This is a company project based on BSE/NSE Exchange. In this the exchange deals with crypto currency where mostly main currencies along with their own Fellium is trade.
This program also exists as a demo account and a main account in which users can learn how to trade here, in which the main user can actually trade with money and crypto currencies. 

My role:- I am responsible for backend tech that is on node js, where all accounts and trades calculation with transfer money, login details, membership and other exchange related things happen. All apies for mobile apps with security handled by me.

This is a tour and trivialism support app, It has two ventures one is for client i.e. SAMY other is Samy Guide.

With your guide SAMY discover your destination like never before.

Once there, he will accompany you where you want and you will enjoy his good plans and good addresses. Your guide can pick you up at the airport and provide you with a local SIM card to facilitate your stay on site. Once you have made your choice, add the options and choose your date of arrival and the place of your first meeting. Then, let you guide according to your desires!

Whether you are the type to know your favorite corners by heart, rather culture "G", or able to go out a thousand anecdotes on YOUR city ... Become a guide for SAMY and earn money. Indicate your description but also the languages ​​you master or the type of activity you want to do with your guests. Offer discounts based on time booked or additional services like pickup at the station or at the airport. Find all previous bookings and any new requests on the app.

Check out their features easily and go out and meet travelers

This app is in French language, The purpose of this app to sold used cars with full details of the car within the app, It is kind of auction where users can bid for a car that is came into frame, Within the app user who are going to sold his car provide full info of that car so that the bidders detect the actual specification and can track there delivery also.