I'm rephrasing my question after reading awesome post provided by @charlietfl. And tried to remove jquery, as possible
There are couple of issues which I'm not able to get rid off.
- How to use angular modules on Parse Cloud.
- Since I don't know how to use Angular on Parse Cloud, I'm not able to create template which I can dynamically load.
So, to work around my 2nd issue, I've no option other than replacing the DOM dynamically(which is bad, I know). There is another requirement, with each div, I want menu to pop-up when user long-presses the div.
So for that I've created another directive long-press and passing it with the DOM. 
This is getting loaded from Parse Cloud Server
for (task in subTasks) {
    var subTaskObj = subTasks[task];
    var taskTitle = subTaskObj.title;
    var taskStatus = subTaskObj.status;
    // Here I'm passing long-press directive
    taskDOM += '<div class="oaerror danger" long-press>' +
        '<div class="col-xs-11"><strong>' + taskTitle + '</strong></div>' +
        '<div class="col-xs-1 pull-right"><img src="images/volunteer-task.png"></div>' +
        '<div class="clearfix"></div>' +
        '</div>';
}
tg-dynamic directive
angular.module('DWrapper.directives')
.directive('tgDynamic', function($compile, WidgetService) {
    return {
        restrict: 'E',
        scope: {
            groupWidget: '@'
        },
        template: '<div/>',
        replace: true,
        link: function(scope, ele, attr) {
            scope.$watch('groupWidget', function(newVal) {
                if (newVal) {
                    widgetService.getWidgetTemplate({"groupWidgetId": newVal })
                        .then(function(widgetResponse) {
                            var template = widgetResponse.data.result.template;
                            $(ele).html($compile(template)(scope));                                
                        });
                }
            });
        }
    };
});

In the image, scope is available only on the root element, and not on long-press directive So, how to inject scope, for the dynamically added long-press directive to work.
