Cryptocurrency Protfolio tracker

I am searching for a developer (or a team ) to build a website, which is based on the idea of giving the members a clear picture of their crypto trades on single or several exchanges. This website calculates the users return on investment over time, profit percentage in each position and also include real-time tracking, Auto Sync of transactions,... (like is [login to view URL] or [login to view URL]). Above this, the website will allow users t buy or sell orders from their dashboard(Manually or automatically if the position reach a certain condition --- mini-bot ---)for example placing trailing buy and sell order, auto close position within time,stop loss... This is the point of this website so you have to be really good at it!!!!!!!!!. Therefore the members' " crypto exchange API " must be kept safe***. The website needs to have a unique and modern design**. Finally, the website will have different functions for different membership plans ( maximum of 3 ). An extra function will be revealed after signing the NDA agreement. Requirement : -The developer has to be a native English speaker ( In cases where I face any difficulty in understanding the developer or the opposite, the contract will be cancelled ). -the developer must sign a non-disclosure agreement (NDA) and another agreement after finishing the work where he declares that he deleted the source code. ( I am extremely strict and serious about this rule !! ). -New freelancers accounts won't be eligible for this job. -The website script and source code will be copyrighted to me. -The last 30 % percent of payment will be released after 20 days of publishing the website (for debugging purposes). -The developer must indicate in his bid description that he achieved all the requirement and describe briefly any experience he have with this kind of projects. -As I am an undergraduate computer science student I have a deep understanding of what the developer is going to do and I can distinguish the easy part from the [login to view URL] in any obvious cases of lying about the complexity or claiming a wrong amount of working hours, the contract will be canceled. -Skills: Website design, Crypto Exchanges API protocols***, and error troubleshooting***, PHP, HTML, Javascript, Online payments managing, Web security. -In the case where the developer asks for a more than 1500 $ in the discussion, the contract will be canceled or the discussion will be [login to view URL], an extra 100 £ will be given for perfect, clean, extremely beautiful and modern design.