Bookstore + Wallet Multi-Platform Solution

I need a complete ecosystem that lets customers buy physical books and, from the same account, top-up mobiles and pay utility bills. The core requirement is a unified wallet: every purchase, every recharge, every cashback sits in that single balance and can be reused across all services... (Budget: ₹37500 - ₹75000 INR, Jobs: Android, API Integration, Backend Development, Frontend Development, iOS Development, Mobile App Development, Next.js, Node.js, PHP, Web Development)