I am looking for an experienced full-stack developer to build a custom one-click checkout system similar in flow to Indian checkout solutions (OTP-based checkout, fast COD flow). Custom checkout page (mobile-first) Phone number based checkout OTP verification (SMS) Short address form (name, address, pincode, state) COD order placement Simple order creation & webhook/API to send order data to merchant Store user data securely (for future autofill feature) Clean, fast UI (no heavy animations)