Beginning jquery on node, how to fix this?

For the following sample:

var $ = require('jquery');
$.ajax({url : 'http://ift.tt/1a1PNfE'})
    .then(function(members) {
        for (var i in members) {
            $.ajax({url : 'http://ift.tt/1gcW4Wp' + members[i].login})
                .then(function(member) {
                    console.log(member.name)
                });
        }
    });

I get this

$.ajax({url : 'http://ift.tt/1a1PNfE'})
  ^
TypeError: undefined is not a function
    at Object.<anonymous> (sample.js:2:3)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Function.Module.runMain (module.js:501:10)
    at startup (node.js:129:16)
    at node.js:814:3

No idea how to fix. Any help?