optimizely+ga-classic+hotjar

(function(){
  // @version 2016.03.11
  var experimentID = COPY_PASTE_ID_FROM_URL;
  
  window.optimizely = window.optimizely || [];

  // avoid firing in editor
  if (window.optimizely.activeExperiments.indexOf(experimentID.toString()) == -1) return;

  if (typeof window.optimizely.data.experiments[experimentID] !== 'undefined') {
    var experimentName = experimentID + ' ' + window.optimizely.data.experiments[experimentID].name;
    var variationName = window.optimizely.data.state.variationNamesMap[experimentID];    
  
    // google analytics events
    window._gaq = window._gaq || [];
    window._gaq.push(['_trackEvent', 'Optimizely', experimentName, variationName, 0, true]);
    
    // hotjar recordings tags
    window.hj = window.hj || function() {(hj.q = hj.q || []).push(arguments)};
    window.hj('tagRecording', [experimentName, variationName]);    
  } 
})();

ga-universal-optimizely https://gist.github.com/lkraav/2ac6f6aef6d3d0a2fb71