EpicPay: Backend Payment Infrastructure

Backend microservices for EpicPay, a payment solutions platform serving 10,000+ users, built on AWS Lambda and Node.js.

The Challenge

The platform needed to process payments reliably at scale while supporting a mobile app that couldn't tolerate breaking API changes as functionality evolved.

Our Solution

Built and maintained serverless backend microservices, designed a REST API versioning strategy so mobile clients kept working through iteration, and layered in JWT auth, ID verification, and selfie authentication for security.

Technical Approach

Node.js microservices on AWS Lambda, an Express/React admin panel for user and transaction management, and WebSockets for real-time transaction status notifications.

Results & Business Impact

• Served 10,000+ platform users with scalable serverless payment processing
• Shipped an API versioning strategy enabling safe mobile client evolution
• Added JWT, ID verification, and selfie-based authentication
• Built real-time transaction status updates via WebSockets