React hybrid framework Mobile app customizations

Need to customize the home screen and shopping page on the mobile app. base code is available as opensource on react framework ([login to view URL]). only the following activities are expected 1) Improvisation of the home screen, menu, app layout, and shopping page a) home screen layout design b) Modify Shopping page to accommodate the product custom variations (combo box listing) on shopping page itself (attached screenshots for reference) 2) history order visibility/repeat order option from the history list 3) Payment gateway (paytm, Rozarpay) integration 4) Smother transition of checkout process