We have around 7+ years in Java/J2EE development. We have experience in both frontend tech stack (ExtJS, Dojo, d3.js, angularJS and Javascript) and J2EE tech (Struts, Spring, JSF etc), DB like (MySQL, Oracle, MSSQL server,PostgreSQL MongoDB)
We have lots of experience with REST API, JSON programming and XML programming also.
Experience in ANT, MAVEN, jenkins for continous build integration.
We always support our code with unit test cases written in Junit/TestNG/Mockito etc
It seems bitfair uses JSON request to get the data. We do have experience in sending/receiving such request. We can discuss it further once we have completed requirements clarification