webApp / CryptoConnectors / Java developerProject:Platform for automatic trading and resolving arbitrage situations at key cryptoexchanges (Binance, Okex, Cexio, Bithumb, Huobi, FTX, GateIO, etc.)Responsibilities: participating in full-cycle backend development. New features implementationwith unit tests coverage and supporting them during their life cycle. Existingcodebase refactoring and supporting. Project architecture improving taking part in planning and grooming, working under Scrum methodology, teamplayer delivering code adjustments to the running application through TeamCity code-reviewing creating project documentation in Confluence and project API in ApiaryTasks: revising and researching APIs documentation of external systems, implementingintegration with such exchanges as Binance, Okex, Cexio etc. using REST APIand WebSockets implementing receiving notifications from external systems (order book updates,orders and balances states changes) by WebSocket using Netty library. integrating various functions such as placing and cancelling orders, gettingbalances, getting trades, getting metadata and others by REST. implemented immediate-or-cancel method for placed orders implemented profit report for given period of time implemented getting crypto-wallets addresses and block chains reducing numbers of microservices calls in order to enhance architecture refactored unit tests and updated Junit version from 4 to 5Technology stack:Backend: Java 8, Spring core, Spring boot, Spring Data, JUnit, RabbitMQ, MongoDB,MongoCompass, REST, WebSocket, Mockito, Git, Postmam