Case study

Mobile Cashback Feature for E-commerce Platform

The Problem:

An online retailer of tech devices sought to implement a cashback feature in its mobile app to boost customer retention and repeat purchases, but lacked a secure, scalable system to calculate, store, and redeem rewards.

Our Solution:

We developed a secure, real-time cashback system integrated into the mobile app, enabling customers to earn, track, and redeem cashback seamlessly.

Technology Stack:

Node.js, React Native, PostgreSQL, Redis, REST APIs, Stripe/payment gateway APIs, AWS

Key Results & Value:

+25% increase in repeat purchases
+18% increase in average order value
Real-time cashback visibility and usage
Secure and transparent reward system
Scalable architecture for future loyalty programs

The Problem

The client operated an e-commerce platform specializing in consumer electronics. Although customer acquisition was strong, retention was a persistent challenge.
The business aimed to launch a cashback program to drive repeat purchases, but several key challenges needed to be addressed:

How to calculate cashback accurately across different products and campaigns
How to securely store and track cashback balances
How customers can easily use cashback during checkout
How to prevent fraud, misuse, or double-spending

Without a reliable system, cashback could pose a financial risk rather than serve as a growth tool.

Key Features

Real-time cashback calculation during and after purchase
Flexible rules engine (by product, category, campaign, or user segment)
Secure user wallet for cashback storage
Full transaction history and audit trail
Cashback usage during checkout (partial or full payment)
Admin panel for managing campaigns and rules
Notifications for earned, used, and expiring cashback
Fraud protection and validation mechanisms

Solution

We designed and implemented a secure cashback ecosystem integrated with both backend systems and the mobile application.

The system calculates cashback dynamically according to predefined rules, which may be based on:

product categories
promotional campaigns
user segments or loyalty tiers

Upon purchase completion, the system automatically calculates the cashback amount as a percentage or fixed value and credits it to the user’s wallet.

Cashback Usage in Payments

Customers can apply their cashback balance directly at checkout.

The system supports:

partial payment (split between cashback and card/payment method)
full payment using cashback (if balance allows)
real-time balance validation before confirming the transaction

This provides a seamless, intuitive experience that encourages users to return and use their rewards.

Security and Data Protection

Security was prioritized, as cashback directly affects financial transactions.

We implemented:

secure transaction handling and encrypted data storage
validation layers to prevent duplicate or fraudulent cashback usage
real-time balance checks to avoid overspending
full audit logs for every начисление and redemption
role-based access control for admin operations

All cashback operations are linked to verified transactions, ensuring transparency and preventing misuse.

System Architecture

The cashback system was built as a modular service that integrates with:

payment systems
order management
user accounts
mobile application interfaces

To ensure performance, we implemented caching and asynchronous processing as needed, enabling the system to handle high transaction volumes without delays. The cashback feature became an integral part of the product experience.

Business Outcome

The cashback feature became a strategic tool rather than a marketing add-on.

It helped the company:

Increase customer lifetime value
Improve retention without heavy discounting
Maintain control over promotional costs
Build a more predictable and scalable loyalty system

Most importantly, it created a foundation for future enhancements – such as personalized rewards, AI-driven campaigns, and deeper integration into the overall product experience.