UVICUO Admin Dashboard
Enterprise fleet management dashboard with real-time analytics and operational insights.
- React
- TypeScript
- React Router
- TanStack Query
- MUI
- D3.js
The problem
The admin dashboard managed large amounts of operational data including expenses, vehicles, drivers, trips, fuel, transactions, and reports. Many pages relied on multiple API requests, resulting in slow page loads and inconsistent user experience.
Data was fetched after components mounted, causing users to wait on almost every page. Duplicate API requests, inconsistent loading states, and scattered error handling also made the application harder to maintain.
The solution
I optimized server state management by implementing TanStack Query (React Query), introducing intelligent caching, background refetching, retries, and centralized API handling to reduce unnecessary network requests.
I implemented React Router loaders to fetch critical data before rendering pages, allowing users to navigate with data already available instead of waiting for components to load. This significantly improved perceived performance and created a smoother user experience.
Implementation details
React Query integration
Migrated API requests to TanStack Query with intelligent caching, stale time configuration, automatic retries, background refetching, and centralized server state management.
React Router data loaders
Implemented React Router loaders to preload API data before rendering pages, reducing loading delays after navigation and improving overall responsiveness.
API optimization
Refactored data fetching across the dashboard by eliminating duplicate requests, sharing cached data between screens, and reducing unnecessary network traffic.
Interactive analytics
Built responsive analytics dashboards using D3.js to visualize operational data including expenses, transactions, fleet performance, and financial reports.
Reusable loading & error handling
Created consistent loading, empty, and error states across the application, making API failures easier to handle while improving maintainability and user experience.
Performance improvements
- Improved page navigation by up to 3× by preloading data before components rendered.
- Significantly reduced duplicate API requests through React Query caching and shared server state.
- Improved dashboard responsiveness by reusing cached data instead of repeatedly fetching the same resources.
- Created smoother page transitions with consistent loading and error handling across the application.
SEO improvements
- The application was an authenticated internal dashboard, so the focus was on performance, maintainability, and user experience rather than search engine optimization.
Challenges & how I solved them
Several dashboard modules depended on multiple heavy API requests, leading to slow loading times.
Used React Router loaders to fetch critical data before rendering and React Query to cache responses, reducing unnecessary requests and improving page performance.
Providing consistent loading and error handling across dozens of dashboard screens.
Developed reusable loading, empty, and error components with centralized API handling, improving maintainability and creating a more consistent user experience.
Displaying large datasets through analytics without affecting application performance.
Built optimized D3.js visualizations that efficiently rendered charts while minimizing unnecessary updates and keeping interactions smooth.
Lessons learned
- Preloading data with React Router loaders creates a much smoother user experience than fetching data after components mount.
- TanStack Query greatly simplifies server state management while improving performance through intelligent caching and background synchronization.
- Consistent loading and error handling across large applications significantly improves both user experience and long-term maintainability.
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