The Challenge
The platform was facing significant technical challenges:
- Legacy codebase with outdated components
- Complex architecture with tightly-coupled components
- Inconsistent UI/UX across different sections
- Technical debt from years of feature additions
- Complex codebase making developer onboarding difficult
Our Approach
Working with a small team, we established a migration roadmap that prioritized user-facing components while maintaining platform stability.
Component Library Migration
The central task was migrating to a modern component library, which involved:
- Creating a component mapping strategy
- Developing a phased migration approach
- Implementing UI regression testing
- Ensuring visual consistency throughout
Architecture Improvements
Key architectural improvements included:
- Modernising state management approaches
- Implementing efficient data fetching patterns
- Creating reusable business logic components
- Establishing clear architectural guidelines
The Solution
The modernized platform featured several key improvements:
Enhanced User Experience
- Implemented modern component library across all interfaces
- Standardized interaction patterns
- Improved accessibility compliance
- Enhanced responsive design
Optimised Development
- Improved code organization
- Reduced complexity for common tasks
- Established clear development patterns
- Created comprehensive documentation
The Results
The Modernisation effort delivered significant improvements:
- Complete Migration: Successfully migrated all components
- Reduced Bug Rate: 40% reduction in UI-related bugs
- Faster Development: 65% improvement in developer productivity
- Accelerated Feature Delivery: 3x faster implementation of new features
- Enhanced Scalability: Established a foundation for future growth
Key Learnings
This project reinforced several important principles for large-scale application Modernisation:
- Incremental Migration: Phased approach allowed for continuous delivery
- Component-First Thinking: Prioritizing component design improved maintainability
- Testing Discipline: Comprehensive testing ensured smooth migration
- Documentation Importance: Clear documentation accelerated onboarding
Technologies Used
- React
- TypeScript
- Redux
- React Query
- Styled Components
- NX Monorepo
- React Testing Library
- Jest
- Jenkins CI/CD