Recruiting Platform Rewrite and Migration

This project involved a complete transformation of a recruiting platform consisting of multiple PHP backend services, React frontend, MongoDB, Redis, supervisor processes, and a WordPress site. Our team led the DevOps process to modernize the entire technology stack and migrate to a scalable cloud infrastructure.

The goal was to upgrade from legacy technologies to modern versions while migrating to Google Cloud Platform, implementing containerization, and establishing GitOps principles for continuous deployment.

The client's recruiting platform was running on outdated technology with PHP 7, older React versions, and on-premises infrastructure that limited scalability and performance. The system required comprehensive modernization to support growing user demands while maintaining service continuity during the transition.

Key challenges included:

• Managing multiple interconnected services during migration
• Ensuring zero-downtime migration from on-premises to cloud
• Updating legacy code dependencies and frameworks
• Implementing modern DevOps practices without disrupting operations
• Containerizing diverse service types (PHP, React, WordPress)
• Establishing new monitoring and security practices

Implementation Strategy:

• Upgraded PHP from version 7 to the latest PHP 8 with comprehensive testing and validation
• Migrated React frontend to Node 21 and implemented modern development practices
• Set up Google Cloud Platform infrastructure from scratch with proper IAM and billing configuration
• Containerized all services and deployed to Google Kubernetes Engine (GKE)
• Implemented CI/CD pipelines using Google Cloud Build for automated deployments
• Deployed ArgoCD to implement GitOps principles and enable continuous deployments
• Implemented Google Security Command Center and Cloud Armor to harden platform security

Resulting infrastructure