Hi, The project looks interesting.
I would suggest creating an angularjs directive for the countdown, then when modal event is fired, we'll put this directive inside it and everything will work fine :)
I'm an experienced web developer working on Angularjs applications for over 2 years and I think that the task will be easy for me to complete :)
Please send a message and let's go over concrete details right now :)
Thanks.
George.