Shopify Application- Cashback and NPS features

Currently, we have a Shopify app that gives out milestone cashback to customers whose purchase value exceeds a set amount. Current features of the Shopify app: Shops can set milestone cashback condition using an embedded Shopify app Milestone offer details are displayed as a header to shoppers Post-purchase, shoppers are given options to claim the cashback for which they are eligible based to purchase value Customers can view, manage and redeem cashback they acquired from various shops using a Messenger bot - view available balance from various shops - redeem the cashback amount as a coupon code which can be used at the shop - messenger plugin on the shop page allows visitors to access the bot from the shop webpage itself Email requirement: Post-purchase send an email to the customers with the following details from given email (1) Wallet amount spent on the last purchase (2) Wallet amount accrued taking into account the cashback received on the last purchase (3) A single coupon code to use remaining wallet cash What is left to be done: All the major tasks for the above requirement is already done. All the info required [ (1), (2), and (3)] are already stored for the messenger bot-based wallet interface. So, this requirement just involves sending emails to customers with the data that is already there. Features to be added: Post-purchase 5-star feedback and review ( on thank you page ) likes the ones found on ride-sharing apps after taking a ride Integrate a messenger bot-based referral program to the Shopify app ( the bot part was done as an independent project, which has to be integrated into this app ) Technologies to be used: stack to be used is similar to the one in this example: [login to view URL] the messenger bot can make use of the back-end of the above ( webhooks etc ) Expectations: Use the technologies mentioned above to add features mentioned above, deploy and manage them, fixing bugs, etc