Need an expert(system analyst best) to give me suggestions for the following:

Situation: am planning to build a cryptocurrency exchange.

-What structure best for scalability and performance . (e.g. distributed or non distributed, how it works..etc in very detail)
-How to ensure the security of the exchange (mechanisms, algorithms..etc, in very detail).
-which programming languages to use for each part of the website(front end, backed and matching engine)
-recommend wallets or node clients most ideal for sending/receiving funds.(for BTC, Bitcoin cash, LTC, ETH, ETC, Monero, DASH)
-recommend useful JavaScript/php frameworks or libraries for the frontend(for such as price chart)
-anything good for building exchange...


Willing to provide an award of 50USD worth of BTC.
PM me or leave a comment in this topic.