re- creating a bitcoin walletservice

[kaddie]

 guys how can we create a wallet services like coinbase unocoin zebpay through which users
 can buy and sell btc and also they can store them

[achow101]

If you have to ask, you probably shouldn't be doing this. Would you feel comfortable knowing that people are trusting you to keep their Bitcoin safe and that if you screw up, you will lose all of their money?

[Enre]

Well to explain processes without syntax:

1. Wallet API and User Backend
2. Middle man Bot
3. BTC-USD Brokerage/Supply
4. Bank and Third Party Payment Processors
5. Cold Wallets
6. Dedicated Servers & Load Balancing

All of these things work together simultaneously, and you'll need way more than just technical expertise.