Hi,
I am an experienced Mobile app developer (both Android and iOS) and have read your requirements and its crystal clear to me with the complete identical scope of work.
Thanks
Relevant Skills and Experience
QuickBooks Payments Integration, Objective-C, Swift, Android Studio, Eclipse, Java, Xcode, Javascript, WebRTC, VoIP, Twilio, etc.
Proposed Milestones
$250 USD - Milestones as per discussion
Additional Services Offered
$1 USD - 1-month free bug fixing and technical support
The budget you have posted for this job is less. Kindly respond if you are flexible with the budget.