Internal Application Migration
Complete migration of internal web application from legacy PHP & MySQL to modern NodeJS and MongoDB architecture
2021
TELUS
Project Overview
TELUS, one of Canada's largest telecommunications companies, needed to modernize a critical internal web application that had become difficult to maintain and scale. I led the complete migration from a legacy PHP/MySQL stack to a modern NodeJS/MongoDB architecture.
The Challenge
The existing PHP application was built on outdated frameworks and patterns, making it difficult to add new features, maintain code quality, and scale with business needs. The MySQL database structure was also becoming a bottleneck for performance and flexibility.
My Role
As the technical lead, I was responsible for architecting the new system, leading a team of 3 remote developers, managing the migration process, and ensuring zero downtime during the transition while maintaining all existing functionality.
Modern Stack
Legacy Stack
Team Management
Technical Implementation
- Designed modern NodeJS architecture with microservices approach
- Migrated relational MySQL data to flexible MongoDB schema
- Implemented RESTful APIs for better integration capabilities
- Established automated testing and deployment pipelines
- Led team of 3 remote developers across different time zones
- Implemented agile development practices and daily standups
- Established code review processes and quality standards
- Coordinated project timeline and milestone deliveries
Data Migration
- Developed automated data migration scripts
- Implemented data validation and integrity checks
- Executed phased rollout with zero downtime
Performance Optimization
- Optimized database queries and indexing
- Implemented caching strategies for improved speed
- Enhanced error handling and monitoring systems
Results & Impact
Technical Improvements
- Complete modernization of legacy application
- Improved scalability and maintainability
- Enhanced security and performance standards
Business Impact
- Reduced maintenance costs and development time
- Enabled faster feature development and deployment
- Improved system reliability and user experience