Jeff Prestes

raspberry pi iot java mqtt android beacon mobile app bluetooth #ethereum physical web raspbian #smartcontract #blockchain blockchain ethereum smartcontract web development golang weareables #quorum #contratosinteligentes #solidity software development api node-red chatbot messenger go bot facebook eddystone beacon nodejs payments android payment braintree nodejs kraken javascript makara adaro mongodb monk mobile braintree payment ios android polymath opensource polimath jdk.dio wiringpi webiopi arduino php business intelligence tests paypal e-commerce mosquitto paypal expresscheckout payment php java javaee quercus openid oauth security corporate governance it service management