Dear Hiring Manager Thanks for your job posting.
I read your job deeply and I think I am very qualified for your job.
I have amazing experiences in iOS and Android programming with many years
Since I'm self employed developer, I can shift my working time to your timezone and I'll finish this project successfully in your requirement.
As I am excellent mobile app developer and backend developer.
If you are interested in working with me, please contact me anytime.
Anyway I am really confident that I can finish this perfectly.
I sincerely hope to work with you.
Thanks