Hi,
I can solve your gradient button issue.
I have experience of 5 years in iOS App Development. I have worked on 10+ long term projects .So, this would be easy task for me. I have also worked on tool like POSTMAN for REST API's and having knowledge in source control tool like GitHub, bitbucket and gitlab etc... and experience with local data storage tool like Core Data, Realm. Please check my profile to view my work history.
Please let me know if you can be available to discuss the project in detail on IM. I will be looking forward to work with you and definitely like to discuss your project once.
Thanks