Programación de app móvil modificacion a codigo existente

Category IT & Programming
Subcategory Apps programming. Android, iOS and others
What is the scope of the project? Medium-sized change
Is this a project or a position? Project
I currently have I have specifications
Required availability As needed
Required platforms Android, iPhone
I need to Modify an existing app
App type Other
Back-end is required Yes
Payment gateway Yes

Delivery term: Not specified

Skills needed