Modernizing a 10-Year Monolithic PHP Internal ERP
Client: Omnex Industrial Supply (Wholesale Distributor)
Strangling a fragile 200,000-line legacy PHP codebase into modular Next.js micro-frontends with zero business interruption.
The Problem
The core ERP system was built on PHP 5.6 without version control or tests. Any developer trying to add features risked breaking warehouse pick-lists.
Key Constraints
- •Warehouse staff could not pause scanning operations during business hours
- •Extensive legacy MySQL stored procedures had to be phased out gradually
Technical Approach & Execution
Implemented the Strangler Fig architectural pattern via an Nginx reverse proxy, routing modernized feature modules to Next.js while legacy modules ran untouched.
Reverse Proxy Strangler Architecture
Configured intelligent path routing so new inventory and reporting modules ran on modern Next.js while legacy routes remained active.
Shared Authentication Session Bridge
Built a secure Redis session bridge allowing users to navigate between legacy PHP and modern Next.js without logging in twice.
Cloud & Deployment
- Nginx Gateway Proxy
- Next.js Frontend Modules
- Redis Session Bridge
- PostgreSQL Data Warehouse
Tools & Languages
Key Engineering Lessons Learned:
- •Incremental strangler migration eliminated the high risk of a single big-bang rewrite
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