Dear, everyone, this is Zhengmin.
I am software manager and engineer for web, mobile and desktop app development.
I've lead and developed so many apps and websites for the last 9 years.
The NDA upgrade fee is $34. You will be prompted to pay the fee right after you click the "SEND" button.Note that by paying for the NDA upgrade, you will be able to send an NDA request to every Freelancer you invite to this Job at no extra cost.