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+# Suggestions for Senior-Level Improvements
+
+## Testing Improvements
+- **Unit Testing with Jest/RTL**
+  - Gain: Catch bugs early, ensure component behavior, easier refactoring
+  - Example: Test hooks like useProductFilters in isolation
+  
+- **Visual Regression Testing**
+  - Gain: Catch unintended UI changes, ensure consistent design
+  - Example: Compare screenshots before/after changes to ProductCard
+
+- **Performance Testing**
+  - Gain: Monitor and maintain site speed, identify bottlenecks
+  - Example: Set Lighthouse score thresholds in CI
+
+## Error Handling
+- **Error Boundaries**
+  - Gain: Graceful failure handling, better user experience
+  - Example: Fallback UI for failed product loads
+
+- **Error Tracking**
+  - Gain: Better debugging, understand user issues
+  - Example: Integration with error tracking service
+
+## Developer Experience
+- **Storybook Integration**
+  - Gain: Better component documentation, easier UI development
+  - Example: Document all variants of ProductCard
+
+- **Stricter TypeScript**
+  - Gain: Catch more bugs at compile time, better maintainability
+  - Example: Enable strict mode, add proper generics
+
+## Performance
+- **Code Splitting**
+  - Gain: Faster initial load, better resource utilization
+  - Example: Lazy load product filters on mobile
+
+- **Image Optimization**
+  - Gain: Faster page loads, better Core Web Vitals
+  - Example: Implement proper next/image strategy
+
+## Monitoring
+- **Analytics**
+  - Gain: Understand user behavior, make data-driven improvements
+  - Example: Track filter usage, cart abandonment
+
+- **Performance Monitoring**
+  - Gain: Catch performance regressions, ensure good user experience
+  - Example: Monitor and alert on Core Web Vitals
+
+## Accessibility
+- **Automated A11y Testing**
+  - Gain: Ensure consistent accessibility, catch regressions
+  - Example: Add axe-core to CI pipeline
+
+## Documentation
+- **API Documentation**
+  - Gain: Easier onboarding, better maintainability
+  - Example: Document GraphQL schema usage
+
+Each suggestion focuses on improving code quality, maintainability, or user experience rather than adding new features. This is because:
+
+1. Core e-commerce features (login, dashboard) are already planned in TODO
+2. Senior-level improvements often focus on non-functional requirements
+3. These improvements demonstrate architectural thinking beyond feature development
+
+## Implementation Priority
+
+1. Testing Improvements
+   - Highest impact on code quality and maintainability
+   - Demonstrates professional development practices
+   - Makes future changes safer
+
+2. Error Handling
+   - Direct impact on user experience
+   - Shows consideration for edge cases
+   - Professional error management
+
+3. Developer Experience
+   - Makes codebase more maintainable
+   - Helps onboard other developers
+   - Shows understanding of team dynamics
+
+4. Performance & Monitoring
+   - Important for scalability
+   - Shows understanding of production concerns
+   - Data-driven improvements
+
+These improvements would elevate the project from a feature demonstration to a production-ready application with professional-grade infrastructure.