Respected authority,
By looking at the job requirements, it shows that you need an IOS developer. Well I am an IOS developer with 3+ years of experience. My recent app was "Personal training coach" for android and IOS in which Charts have been implemented. I have worked with 10+ cloud based apps. I have worked with complex UI by giving them flexibility to change them in future.
Moving forward, I can dedicate 30 hours per week and number of my working hours are negotiable. Feel free to ask anything.
Regards.