cryptocurrency simple / triangular / quadrangular arbitrage scraper & centralized trading plateform

Hello, I am looking for a developer with excellent knowledge in cryptoccurencies trading and especially in simple, triangular and quadrangular arbitrage to develop a scraper that can search for different arbitrage opportunities in different cryptocurrency exchanges. Eventually, we can setup bots to automatically perform the corresponding trades transactions. At the moment i am more interested in a decision making system rather than an automated trading bot; therefore we will focus on a price arbitrage searching algorithm and a centralized manual trading platform able to manually send orders to the different exchanges from a single interface Specifications: - must be able to continuously scrap up to 20 exchanges and convert data into native currency $ or Eur and determine the best strategy, pairs, and chain of execution - software or web based interface - must be easily customizable and configurable - must be able to take into account the trade fees, lenght of execution, lenght of fiat / crypto withrdrawal and deposits, exit options, and liquidity, when making decision - must be able to add / remove new exchanges easily by adding new JSON / REST API script - must be able to monitor autonomously and propose different options / trades to the user - must allow centralized trading on a single platform Of course, there are already many arbitrage bots and scrappers out there. I'm looking for reliabilty speed of execution regardless of the programming language chosen. Finally I wish to own the right to the sources of the software and have insurance that the code won't be resold. Please add examples of work of the same type that you have done