I've hand-on experience in working with chaincode. Also, I've experience in making API calls using go lang and Node.js (whatever language the chaincode is written in).
I have a experience in Java, spring MVC,jstl, hibernate, asp.net, MVC, web API, c#, SQL, entity framework,linq, razor view (Cshtl), html, bootstrap,Angular JS, Jquery, Json,XML, reports (PDF,xls, crystal, rdlc,ssrs).