Large-Scale Migration Project
Legacy System Overhaul
Supporting the migration from legacy systems to a modern technology stack. We deliver a simultaneous overhaul across all platforms: Web, iOS, and Android.
Overview
A large-scale project migrating an aging legacy system to a modern Next.js/React/Kotlin/Swift stack. We achieved a zero-downtime migration for a service with more than one million users.
Using AI-assisted code conversion and a phased migration strategy, we minimized risk. While improving the user experience, we also achieved a significant reduction in operating costs.
Challenge & Solution
Zero-Downtime Migration
A service with more than one million users could not be taken offline.
Phased migration and feature flags enabled a switchover with zero downtime.
Multi-Platform
Web, iOS, and Android all had to be overhauled at the same time.
A shared API and code-sharing strategy kept all platforms in sync during migration.
AI Assistance
Converting the enormous legacy codebase required too much effort.
AI-based code conversion dramatically streamlined the migration work.
Tech Stack
- Python
- React
- Next.js
- AWS
- Kotlin
- Swift
- ChatGPT
AI Phone System