Hey mate
I have read your description carefully that I can integrate API & design UI for this application in flutter. I am glad to tell you that I've 1+ years of experience in flutter development & 5 + years of experience in android & ios mobile application.
I've also knowledge in native android(java, kotlin), native ios(Objective C, Swift) & hybrid (React-native, ionic), Cross platform(Flutter).
Let's come over chat so that we can start it immediately.
Thanks & Regards
Vikas