Basic integration of few crypto exchanges into java 8/Retrofit library

Project requires integrating six crypto exchanges into my library that is already designed and provides developer with guidance on how to integrate new ones. First five exchanges need only integrating public orderbook API. However, sixth exchange Bitstamp needs integration of private endpoints for orders management. I would also expect Bitstamp integration to be properly tested. I’m looking for candidate with 1-2 years of Java 8 development experience who knows Retrofit, Git and Intellij. Bonus points for having trading account on Bitstamp to thoroughly test integration. Project details: - market_data_exchanges file contains list of exchanges for which I only need integrating public endpoint that returns OrderBook and mapping it to my internal OrderBook representation. This work should be pretty straightforward. - bitstamp_integration contains list of Bitstamp endpoints that need to be integrated. List includes both market data and private order management endpoints. I would expect majority of work to be associated with this integration. Before offering project I would like to have quick online chat with future candidate to discuss details and assess technical skill level. Shouldn't be more than 30-40 min. Thanks, Pawel