QR-Based Digital Membership Card System – Integration Issue

[dicogi]

Hi everyone, I’ve been developing a system to replace traditional physical cards with a QR-based solution that users can store on their smartphones. The idea is to build something lightweight, secure, and fully self-hosted, without relying on third-party SaaS platforms like Membership Anywhere . Each user gets a unique QR code that can be scanned for quick verification during events, office access, or attendance tracking, making the overall process faster and more efficient. At its core, the platform works as a digital membership card software where each member is issued a secure, scannable identity that can be validated in real time. This digital membership card approach removes the need for physical IDs while still keeping verification simple and reliable across different environments. The backend currently runs on a Linux (Ubuntu-based) setup, with QR generation per user and a basic verification endpoint. There’s also a simple web interface for issuing and managing cards, with a focus on minimal dependencies for better performance and control. I’m now exploring how this system can integrate into enterprise environments, especially where scalability, security, and integration layers are important. I’d appreciate insights on designing secure APIs for QR verification, handling authentication between scanning devices and backend services, and whether using an API gateway or ESB (such as webMethods) would add value.