Bitcoin Aggregator

Hello, I am looking to develop a platform that can connect via API to multiple bitcoin exchanges such as BTC markets ([login to view URL]), Bitfinex ([login to view URL]), etc and reflect their trading book onto our platform. Essentially this platform will act as a aggregator we need to have capabilities to add spreads, brokerage, etc. Build order capabilities such as limit and market orders, etc. Essentially we want to build a Bitcoin aggregator and trading platform. Nothing complex required however as this will be just a showcase platform. Thank you.