How I Designed the Backend System for a DIGITAL BUSINESS CARD: Popl, Dialo, Mobilo

Introduction In this blog, we will design the backend system of a DIGITAL BUSINESS CARD and explore how companies like Popl, Dialo, Mobilo, HiHello, etc. build robust, scalable, and powerful systems. These systems handle everything from QR code scanning to lead notifications, leveraging caching and message queuing to provide real-time updates. Key Features: ✅ QR Code scanning ✅ Caching for faster retrieval ✅ Asynchronous Processing via Message Queue ✅ Rate limiting & Load Balancing for Performance High-Level Architecture This system follows a modular approach to ensure scalability. Let's break down how different components connect to build an optimized system that serves users efficiently.

Mar 14, 2025 - 12:21

How I Designed the Backend System for a DIGITAL BUSINESS CARD: Popl, Dialo, Mobilo

Introduction

In this blog, we will design the backend system of a DIGITAL BUSINESS CARD and explore how companies like Popl, Dialo, Mobilo, HiHello, etc. build robust, scalable, and powerful systems. These systems handle everything from QR code scanning to lead notifications, leveraging caching and message queuing to provide real-time updates.

Key Features:

✅ QR Code scanning
✅ Caching for faster retrieval
✅ Asynchronous Processing via Message Queue
✅ Rate limiting & Load Balancing for Performance

High-Level Architecture

This system follows a modular approach to ensure scalability. Let's break down how different components connect to build an optimized system that serves users efficiently.